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Cách lưu đối tượng tệp trong python

Ngày đăng: 30/11/2022
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Pickle có thể được sử dụng để tuần tự hóa và giải tuần tự hóa các đối tượng. Một đối tượng được tuần tự hóa có thể được lưu và tải từ đĩa. Pickling là một phương thức để chuyển đổi một đối tượng (list, dict, v.v.) thành một tệp và ngược lại

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Ý tưởng là lưu một hoặc nhiều đối tượng trong một tập lệnh và tải chúng vào một tập lệnh khác. Bạn cũng có thể sử dụng nó để lưu trạng thái chương trình hoặc trò chơi

Chúng tôi sẽ lưu và tải bằng tệp nhị phân, vì điều này giúp tiết kiệm dung lượng ổ đĩa

khóa học liên quan. Hoàn thành khóa học & bài tập lập trình Python

Tuần tự hóa đối tượng

Để sử dụng tính năng ngâm chua, hãy nhập mô-đun dưa chua.
Tạo một đối tượng và đánh số thứ tự cho nó. Sau đó ghi nó vào một tệp bằng đối tượng tệp. 

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import pickle

exampleObj = {'Python':3,'KDE':5,'Windows':10}

fileObj = open('data.obj', 'wb')
pickle.dump(exampleObj,fileObj)
fileObj.close()

giải tuần tự hóa đối tượng

Bây giờ đối tượng đã được lưu vào một tệp, bạn có thể tải nó (giải nén nó). Trong ví dụ bên dưới, chúng tôi tải đối tượng từ tệp

Khi bạn thêm 'b' vào các chế độ truy cập, bạn có thể đọc tệp ở định dạng nhị phân thay vì định dạng văn bản mặc định. Nó được sử dụng khi tệp được truy cập không ở dạng văn bản

  • đã đọc([kích thước]). Nó đọc toàn bộ tệp và trả về nội dung dưới dạng một chuỗi. Đọc ở hầu hết các byte kích thước từ tệp (ít hơn nếu lần đọc đạt EOF trước khi nhận được các byte kích thước). Nếu đối số kích thước là âm hoặc bị bỏ qua, hãy đọc tất cả dữ liệu cho đến khi đạt đến EOF




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    7

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    2
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    7____28

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9

  • đường đọc([size]). Nó đọc dòng đầu tiên của tệp i. e cho đến ký tự xuống dòng hoặc EOF trong trường hợp tệp có một dòng và trả về một chuỗi. Nếu đối số kích thước xuất hiện và không âm, thì đó là số byte tối đa (bao gồm cả dòng mới ở cuối) và một dòng không đầy đủ có thể được trả về. Một chuỗi rỗng chỉ được trả về khi gặp phải EOF ngay lập tức




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    70

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    2
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    78

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    81
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    82
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    7____28

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9

  • đường đọc([sizehint]). Nó đọc toàn bộ tệp theo từng dòng và cập nhật từng dòng thành một danh sách được trả về. Đọc cho đến khi EOF sử dụng readline() và trả về danh sách chứa các dòng do đó đã đọc. Nếu có đối số sizehint tùy chọn, thay vì đọc đến EOF, toàn bộ dòng có tổng xấp xỉ byte sizehint (có thể sau khi làm tròn đến kích thước bộ đệm bên trong) được đọc




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    7

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    2
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    78

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    98
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    99
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    7____28

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9

  • viết (chuỗi). Nó ghi nội dung của chuỗi vào tệp. Nó không có giá trị trả về. Do bộ đệm, chuỗi có thể không thực sự hiển thị trong tệp cho đến khi phương thức flush() hoặc close() được gọi




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    04

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    09
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    11
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    13

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    15

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    16

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9

    Thêm ví dụ trong các chế độ khác nhau




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    18

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    23
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    25
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    27

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    28

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    30

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    35
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    25
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    27

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    28

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    42

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    47
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    25
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    13

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    28

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    04

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    09
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    25
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    27

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    28

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9

  • dòng viết (trình tự). Nó là một chuỗi các chuỗi vào tệp thường là một danh sách các chuỗi hoặc bất kỳ loại dữ liệu có thể lặp lại nào khác. Nó không có giá trị trả về




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    04

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    09
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    25
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    25

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    27

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    28

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9

  • kể(). Nó trả về một số nguyên cho chúng ta biết vị trí của đối tượng tệp từ đầu tệp ở dạng byte




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    30

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    2
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    25
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3______24
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    43

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    7____245

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9

  • tìm kiếm (bù đắp, from_where). Nó được sử dụng để thay đổi vị trí của đối tượng tệp. Offset cho biết số lượng byte được di chuyển. from_where cho biết các byte sẽ được di chuyển từ đâu




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    47

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    2
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    25
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3______24
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    7____260

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    62

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    7______264____265____266
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    65
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    68

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    25
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3______24
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    7____260

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9

  • tuôn ra(). Xóa bộ đệm bên trong, như fflush() của stdio. Nó không có giá trị trả về. close() tự động xóa dữ liệu nhưng nếu bạn muốn xóa dữ liệu trước khi đóng tệp thì bạn có thể sử dụng phương pháp này




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    77

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    2
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    25
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3______24
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    90

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    91

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    7
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    93

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9

  • thư mục số(). Trả về bộ mô tả tệp số nguyên được triển khai bên dưới sử dụng để yêu cầu các thao tác I/O từ hệ điều hành




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    95

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    2
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    703

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    7____7705

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9

  • isatty(). Trả về True nếu tệp được kết nối với thiết bị tty(-like) và Sai nếu không




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    707

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    2
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    715

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    7____7717

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9

  • tiếp theo(). Nó được sử dụng khi một tệp được sử dụng làm trình vòng lặp. Phương thức được gọi lặp đi lặp lại. Phương thức này trả về dòng đầu vào tiếp theo hoặc tăng StopIteration tại EOF khi tệp được mở để đọc (hành vi không được xác định khi được mở để ghi)




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    719

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    2
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    727

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    728
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    729

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    730
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    731 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    732
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    733
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    734

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    735
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    7______7737
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    733
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    739

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    740
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    729

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    730
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9

  • cắt ngắn([size]). Cắt bớt kích thước của tệp. Nếu có đối số kích thước tùy chọn, tệp sẽ bị cắt bớt (tối đa) kích thước đó. Kích thước mặc định cho vị trí hiện tại. Vị trí tệp hiện tại không bị thay đổi. Lưu ý rằng nếu một kích thước được chỉ định vượt quá kích thước hiện tại của tệp, kết quả sẽ phụ thuộc vào nền tảng. các khả năng bao gồm tệp có thể không thay đổi, tăng đến kích thước đã chỉ định như thể không được lấp đầy hoặc tăng đến kích thước đã chỉ định với nội dung mới không xác định




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    744

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    09
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    752

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    753
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9

  • gần(). Dùng để đóng một tập tin đang mở. Một tệp đã đóng không thể đọc hoặc ghi được nữa




    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    757

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    8
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9 
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    0
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    1
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    2
    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    3

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    4

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    765

    r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
    9

  • Thuộc tính
    • đóng cửa. trả về một giá trị boolean cho biết trạng thái hiện tại của đối tượng tệp. Nó trả về true nếu tệp bị đóng và sai khi tệp đang mở
    • mã hóa. Mã hóa mà tập tin này sử dụng. Khi các chuỗi Unicode được ghi vào một tệp, chúng sẽ được chuyển đổi thành các chuỗi byte bằng mã hóa này
    • cách thức. Chế độ I/O cho tệp. Nếu tệp được tạo bằng hàm tích hợp open(), đây sẽ là giá trị của tham số chế độ
    • Tên. Nếu đối tượng tệp được tạo bằng open(), tên của tệp
    • dòng mới. Một đối tượng tệp đã được mở ở chế độ dòng mới chung có thuộc tính này phản ánh quy ước dòng mới được sử dụng trong tệp. Giá trị cho thuộc tính này là “\r”, “\n”, “\r\n”, Không có hoặc một bộ chứa tất cả các loại dòng mới đã thấy
    • không gian mềm. Đó là một boolean cho biết liệu một ký tự khoảng trắng có cần được in trước một giá trị khác hay không khi sử dụng câu lệnh in




      r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
      8
      r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
      9 
      r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
      0
      r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
      1
      r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
      09
      r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
      3

      r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
      7____7774

      r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
      7____7776

      r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
      7____7778

      r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
      7____7780

      r: Opens a file for reading only
r+: Opens a file for both reading and writing
w: Opens a file for writing only
w+: Open a file for writing and reading.
a: Opens a file for appending
a+: Opens a file for both appending and reading
      7____7782

    • Bài viết liên quan.
    Đọc và ghi vào tệp văn bản bằng Python

    Tham khảo. https. // tài liệu. con trăn. tổ chức/2. 4/lib/bltin-tệp-đối tượng. html
    Bài viết này được đóng góp bởi Sri Sanketh Uppalapati. Nếu bạn thích GeeksforGeeks và muốn đóng góp, bạn cũng có thể viết một bài báo bằng cách sử dụng đóng góp. chuyên viên máy tính. org hoặc gửi bài viết của bạn tới donate@geeksforgeeks. tổ chức. Xem bài viết của bạn xuất hiện trên trang chính của GeeksforGeeks và trợ giúp các Geeks khác.

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    Pickle có thể cứu đồ vật không?

    Pickling là một phương thức để chuyển đổi một đối tượng (danh sách, dict, v.v.) thành tệp và ngược lại . Ý tưởng là lưu một hoặc nhiều đối tượng trong một tập lệnh và tải chúng vào một tập lệnh khác. Bạn cũng có thể sử dụng nó để lưu trạng thái chương trình hoặc trò chơi. Chúng tôi sẽ lưu và tải bằng tệp nhị phân, vì điều này giúp tiết kiệm dung lượng ổ đĩa.

    Tệp và đối tượng tệp trong Python là gì?

    Một đối tượng tệp cho phép chúng tôi sử dụng, truy cập và thao tác với tất cả các tệp mà người dùng có thể truy cập . Người ta có thể đọc và ghi bất kỳ tệp nào như vậy. Khi thao tác với tệp không thành công vì lý do liên quan đến I/O, ngoại lệ IOError sẽ xuất hiện.

    programming python

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