Xóa chuỗi trong chuỗi Python

Bài viết này trình bày một vấn đề như vậy về việc xóa ký tự thứ i khỏi chuỗi và nói về các giải pháp khả thi có thể được sử dụng để đạt được chúng bằng Python

Xóa ký tự thứ i khỏi chuỗi bằng phương thức gốc

Trong phương pháp này, người ta chỉ cần chạy một vòng lặp Python và nối thêm các ký tự khi chúng xuất hiện và tạo một chuỗi mới từ chuỗi hiện có trừ khi chỉ mục là i.  

Python3

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

30

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

32

 

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

33

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

0

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

2

 

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

3

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

4

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

5

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

6

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

7

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

8

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

9

The string after removal of i'th character : GeksForGeeks

0

The string after removal of i'th character : GeksForGeeks

1

The string after removal of i'th character : GeksForGeeks

2

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character : GeksForGeeks

4

The string after removal of i'th character : GeksForGeeks

5

The string after removal of i'th character : GeksForGeeks

6

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

0

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

0

The string after removal of i'th character : GeksForGeeks

0

The string after removal of i'th character : GeksForGeeks

1

 

The string after removal of i'th character : GeksForGeeks

2

The string after removal of i'th character : GeksForGeeks

3

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

7

The string after removal of i'th character : GeksForGeeks

5

The string after removal of i'th character : GeksForGeeks

0

The string after removal of i'th character : GeksForGeeks

7

đầu ra

The string after removal of i'th character : GeksForGeeks

Xóa ký tự thứ i khỏi chuỗi bằng cách sử dụng str. thay thế()

các str. replace() có thể được sử dụng để thực hiện tác vụ xóa vì chúng ta có thể thay thế chỉ mục cụ thể bằng char trống và do đó giải quyết được sự cố.  

Hạn chế. Hạn chế chính của phương pháp này là nó không thành công trong trường hợp có các bản sao trong một chuỗi khớp với char tại vị trí. tôi. replace() thay thế tất cả các lần xuất hiện của một ký tự cụ thể và do đó sẽ thay thế tất cả các lần xuất hiện của tất cả các ký tự tại vị trí i. Đôi khi chúng ta vẫn có thể sử dụng chức năng này nếu ký tự thay thế xuất hiện lần đầu tiên trong chuỗi.  

Python3

The string after removal of i'th character : GeksForGeeks

8

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

30

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

32

 

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

33

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

73

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

0

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

76____277

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

78

 

The string after removal of i'th character : GeksForGeeks

2

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

30

The string after removal of i'th character : GeksForGeeks

3

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

7

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

33

The string after removal of i'th character : GeksForGeeks

0

The string after removal of i'th character : GeksForGeeks

7

 

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

36

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

37

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

0______131

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

76____1301

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

302

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

303

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

304

 

The string after removal of i'th character : GeksForGeeks

2

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

306

The string after removal of i'th character : GeksForGeeks

3

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

7

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

309

The string after removal of i'th character : GeksForGeeks

0

The string after removal of i'th character : GeksForGeeks

7

đầu ra

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

Xóa ký tự thứ i khỏi chuỗi bằng cách sử dụng lát cắt + nối

Người ta có thể sử dụng cắt chuỗi và cắt chuỗi trước pos i và cắt sau pos i. Sau đó, sử dụng phép nối chuỗi của cả hai, ký tự thứ i có thể bị xóa khỏi chuỗi.  

Python3

The string after removal of i'th character : GeksForGeeks

8

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

30

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

32

 

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

33

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

317

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

0______131

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

320

The string after removal of i'th character : GeksForGeeks

4

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

322

The string after removal of i'th character : GeksForGeeks

0

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

324

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

325

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

326

 

The string after removal of i'th character : GeksForGeeks

2

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

328

The string after removal of i'th character : GeksForGeeks

3

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

7

The string after removal of i'th character : GeksForGeeks

5

The string after removal of i'th character : GeksForGeeks

0

The string after removal of i'th character : GeksForGeeks

7

đầu ra

The string after removal of i'th character : GeksForGeeks

Xóa ký tự thứ i khỏi chuỗi bằng cách sử dụng str. tham gia () và hiểu danh sách

Trong phương pháp này, trước tiên, mỗi phần tử của chuỗi được chuyển đổi thành từng phần tử của danh sách, sau đó mỗi phần tử trong số chúng được nối để tạo thành một chuỗi ngoại trừ chỉ mục đã chỉ định.  

Python3

The string after removal of i'th character : GeksForGeeks

8

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

30

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

32

 

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

33

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

339

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

0

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

02

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

3

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

4

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

5

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

6

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

7

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

8

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

09

The string after removal of i'th character : GeksForGeeks

1

The string after removal of i'th character : GeksForGeeks

2

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character : GeksForGeeks

4

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

14

 

The string after removal of i'th character : GeksForGeeks

2

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

328

The string after removal of i'th character : GeksForGeeks

3

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

7

The string after removal of i'th character : GeksForGeeks

5

The string after removal of i'th character : GeksForGeeks

0

The string after removal of i'th character : GeksForGeeks

7

đầu ra.  

The string after removal of i'th character : GeksForGeeks

Xóa ký tự cụ thể khỏi chuỗi bằng translate()

Trong phương pháp này, chúng tôi đã xóa 123 khỏi Geeksforgeeks bằng cách sử dụng chuỗi. Phiên dịch().  

Python3

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

22

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

24

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

25

The string after removal of i'th character : GeksForGeeks

3

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

7

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

22

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

29

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

30

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

32

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

3

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

4

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

5

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

36

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

37

đầu ra

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

7

Sử dụng đệ quy

Để sử dụng đệ quy để xóa ký tự thứ i khỏi một chuỗi, bạn có thể định nghĩa một hàm đệ quy nhận vào chuỗi và chỉ mục cần xóa làm đối số. Hàm có thể kiểm tra xem chỉ mục có bằng 0 hay không, trong trường hợp đó, hàm sẽ trả về chuỗi đã xóa ký tự đầu tiên. Nếu chỉ số không phải là 0, hàm có thể trả về ký tự đầu tiên của chuỗi được nối với kết quả của việc gọi lại hàm trên chuỗi có chỉ số giảm đi 1

Đây là một ví dụ về cách bạn có thể thực hiện phương pháp này

Python3

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

38

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

39

The string after removal of i'th character : GeksForGeeks

0

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

41

The string after removal of i'th character : GeksForGeeks

0

The string after removal of i'th character : GeksForGeeks

1

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

4

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

47

The string after removal of i'th character : GeksForGeeks

5

The string after removal of i'th character : GeksForGeeks

6

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

50

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

51

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

303

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

326

The string after removal of i'th character : GeksForGeeks

0

The string after removal of i'th character : GeksForGeeks

0

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

56

The string after removal of i'th character : GeksForGeeks

0

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

50

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

51

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

47

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

322

The string after removal of i'th character : GeksForGeeks

0

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

63

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

303

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

65

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

66

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

303

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

304

 

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

69

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

30

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

32

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

0

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

31

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

75

The string after removal of i'th character : GeksForGeeks

4

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

304

The string after removal of i'th character : GeksForGeeks

3

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

7

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

80

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

81

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

82

Đầu ra

The string after removal of i'th character( doesn't work) : GksForGks
The string after removal of i'th character(works) : GeekForGeeks

3

Xét về độ phức tạp về thời gian, cách tiếp cận này có độ phức tạp về thời gian là O(n) trong đó n là độ dài của chuỗi, bởi vì hàm thực hiện một lệnh gọi đệ quy duy nhất cho mỗi ký tự trong chuỗi

Về độ phức tạp của không gian, cách tiếp cận này có độ phức tạp của không gian là O(n) vì hàm thực hiện lệnh gọi đệ quy cho từng ký tự trong chuỗi và mỗi lệnh gọi yêu cầu không gian trên ngăn xếp cuộc gọi