Hướng dẫn how do you print a string upto a specific character in python? - làm thế nào để bạn in một chuỗi tối đa một ký tự cụ thể trong python?

Giả sử chúng ta có:

s = "wolfdo65gtornado!salmontiger223" + some_other_string

import itertools as itts
get_start_of_string = lambda stryng, last, *, itts=itts:\
                          str[itts.takewhile[lambda ch: ch != last, stryng]]
###########################################################
s = "wolfdo65gtornado!salmontiger223"
start_of_string = get_start_of_string[s, "!"]

import itertools as itts
get_start_of_string = lambda stryng, last, *, itts=itts:\
                          str[itts.takewhile[lambda ch: ch != last, stryng]]
###########################################################
s = "wolfdo65gtornado!salmontiger223"
start_of_string = get_start_of_string[s, "!"]

import itertools as itts
get_start_of_string = lambda stryng, last, *, itts=itts:\
                          str[itts.takewhile[lambda ch: ch != last, stryng]]
###########################################################
s = "wolfdo65gtornado!salmontiger223"
start_of_string = get_start_of_string[s, "!"]

import itertools as itts
get_start_of_string = lambda stryng, last, *, itts=itts:\
                          str[itts.takewhile[lambda ch: ch != last, stryng]]
###########################################################
s = "wolfdo65gtornado!salmontiger223"
start_of_string = get_start_of_string[s, "!"]

Tại sao

import itertools as itts
get_start_of_string = lambda stryng, last, *, itts=itts:\
                          str[itts.takewhile[lambda ch: ch != last, stryng]]
###########################################################
s = "wolfdo65gtornado!salmontiger223"
start_of_string = get_start_of_string[s, "!"]

4

Bên trong cơ thể của một chức năng, chẳng hạn như

import itertools as itts
get_start_of_string = lambda stryng, last, *, itts=itts:\
                          str[itts.takewhile[lambda ch: ch != last, stryng]]
###########################################################
s = "wolfdo65gtornado!salmontiger223"
start_of_string = get_start_of_string[s, "!"]

import itertools as itts
get_start_of_string = lambda stryng, last, *, itts=itts:\
                          str[itts.takewhile[lambda ch: ch != last, stryng]]
###########################################################
s = "wolfdo65gtornado!salmontiger223"
start_of_string = get_start_of_string[s, "!"]

import itertools as itts
get_start_of_string = lambda stryng, last, *, itts=itts:\
                          str[itts.takewhile[lambda ch: ch != last, stryng]]
###########################################################
s = "wolfdo65gtornado!salmontiger223"
start_of_string = get_start_of_string[s, "!"]

import itertools as itts
get_start_of_string = lambda stryng, last, *, itts=itts:\
                          str[itts.takewhile[lambda ch: ch != last, stryng]]
###########################################################
s = "wolfdo65gtornado!salmontiger223"
start_of_string = get_start_of_string[s, "!"]

color = "white"
get_fleece_color = lambda shoop: shoop + ", whose fleece was as " + color + " as snow."

print[get_fleece_color["Igor"]]

# [... many lines of code later...]

color = "pink polka-dotted"
print[get_fleece_color["Igor's cousin, 3 times removed"]]

Đầu ra là:

Igor, whose fleece was white as snow.
Igor's cousin, 3 times removed Igor, whose fleece was as pink polka-dotted as snow.

In [các] ký tự cụ thể trong một chuỗi trong python #

Sử dụng cắt chuỗi để in các ký tự cụ thể trong một chuỗi, ví dụ:

import itertools as itts
get_start_of_string = lambda stryng, last, *, itts=itts:\
                          str[itts.takewhile[lambda ch: ch != last, stryng]]
###########################################################
s = "wolfdo65gtornado!salmontiger223"
start_of_string = get_start_of_string[s, "!"]

import itertools as itts
get_start_of_string = lambda stryng, last, *, itts=itts:\
                          str[itts.takewhile[lambda ch: ch != last, stryng]]
###########################################################
s = "wolfdo65gtornado!salmontiger223"
start_of_string = get_start_of_string[s, "!"]

Copied!
my_str = 'bobbyhadz.com'

# ✅ print first character in string
print[my_str[0]]  # 👉️ 'b'

# ✅ print second character in string
print[my_str[1]]  # 👉️ 'o'

# ✅ print last character in string
print[my_str[-1]]  # 👉️ 'm'

# ✅ print first 5 characters in string
print[my_str[:5]]  # 👉️ 'bobby'

# ✅ print last 5 characters in string
print[my_str[-5:]]  # 👉️ 'z.com'

# ✅ print each character and its index in string
for index, char in enumerate[my_str]:
    print[index, char]

3 ví dụ đầu tiên truy cập vào một ký tự cụ thể tại chỉ mục của nó và in kết quả.

Các chỉ mục Python là dựa trên 0, do đó, ký tự đầu tiên trong một chuỗi có chỉ số

color = "white"
get_fleece_color = lambda shoop: shoop + ", whose fleece was as " + color + " as snow."

print[get_fleece_color["Igor"]]

# [... many lines of code later...]

color = "pink polka-dotted"
print[get_fleece_color["Igor's cousin, 3 times removed"]]

color = "white"
get_fleece_color = lambda shoop: shoop + ", whose fleece was as " + color + " as snow."

print[get_fleece_color["Igor"]]

# [... many lines of code later...]

color = "pink polka-dotted"
print[get_fleece_color["Igor's cousin, 3 times removed"]]

color = "white"
get_fleece_color = lambda shoop: shoop + ", whose fleece was as " + color + " as snow."

print[get_fleece_color["Igor"]]

# [... many lines of code later...]

color = "pink polka-dotted"
print[get_fleece_color["Igor's cousin, 3 times removed"]]

Copied!
my_str = 'bobbyhadz.com'

print[my_str[0]]  # 👉️ 'b'

print[my_str[1]]  # 👉️ 'o'

print[my_str[-1]]  # 👉️ 'm'

Các chỉ số âm có thể được sử dụng để đếm ngược, ví dụ:

color = "white"
get_fleece_color = lambda shoop: shoop + ", whose fleece was as " + color + " as snow."

print[get_fleece_color["Igor"]]

# [... many lines of code later...]

color = "pink polka-dotted"
print[get_fleece_color["Igor's cousin, 3 times removed"]]

color = "white"
get_fleece_color = lambda shoop: shoop + ", whose fleece was as " + color + " as snow."

print[get_fleece_color["Igor"]]

# [... many lines of code later...]

color = "pink polka-dotted"
print[get_fleece_color["Igor's cousin, 3 times removed"]]

Hàm in có một hoặc nhiều đối tượng và in chúng thành

color = "white"
get_fleece_color = lambda shoop: shoop + ", whose fleece was as " + color + " as snow."

print[get_fleece_color["Igor"]]

# [... many lines of code later...]

color = "pink polka-dotted"
print[get_fleece_color["Igor's cousin, 3 times removed"]]

Lưu ý rằng hàm

import itertools as itts
get_start_of_string = lambda stryng, last, *, itts=itts:\
                          str[itts.takewhile[lambda ch: ch != last, stryng]]
###########################################################
s = "wolfdo65gtornado!salmontiger223"
start_of_string = get_start_of_string[s, "!"]

color = "white"
get_fleece_color = lambda shoop: shoop + ", whose fleece was as " + color + " as snow."

print[get_fleece_color["Igor"]]

# [... many lines of code later...]

color = "pink polka-dotted"
print[get_fleece_color["Igor's cousin, 3 times removed"]]

color = "white"
get_fleece_color = lambda shoop: shoop + ", whose fleece was as " + color + " as snow."

print[get_fleece_color["Igor"]]

# [... many lines of code later...]

color = "pink polka-dotted"
print[get_fleece_color["Igor's cousin, 3 times removed"]]

Thay vào đó, lưu trữ biểu thức trong một biến và in kết quả.

Copied!
my_str = 'bobbyhadz.com'

first = my_str[0]
print[first]  # 👉️ 'b'

Nếu bạn cố gắng truy cập một chỉ mục không có trong chuỗi, một

color = "white"
get_fleece_color = lambda shoop: shoop + ", whose fleece was as " + color + " as snow."

print[get_fleece_color["Igor"]]

# [... many lines of code later...]

color = "pink polka-dotted"
print[get_fleece_color["Igor's cousin, 3 times removed"]]

Bạn có thể sử dụng câu lệnh

Igor, whose fleece was white as snow.
Igor's cousin, 3 times removed Igor, whose fleece was as pink polka-dotted as snow.

Copied!
my_str = 'bobbyhadz.com'

try:
    print[my_str[100]]
except IndexError:
    # 👇️ this runs
    print['Specified index out of range']

Nếu bạn cần in nhiều ký tự trong một chuỗi, hãy sử dụng cắt chuỗi.

Copied!
my_str = 'bobbyhadz.com'

# ✅ print first 5 characters in string
print[my_str[:5]]  # 👉️ 'bobby'

# ✅ print last 5 characters in string
print[my_str[-5:]]  # 👉️ 'z.com'

Cú pháp để cắt chuỗi là

Igor, whose fleece was white as snow.
Igor's cousin, 3 times removed Igor, whose fleece was as pink polka-dotted as snow.

Chỉ số

Igor, whose fleece was white as snow.
Igor's cousin, 3 times removed Igor, whose fleece was as pink polka-dotted as snow.

Igor, whose fleece was white as snow.
Igor's cousin, 3 times removed Igor, whose fleece was as pink polka-dotted as snow.

Nếu chỉ số

Igor, whose fleece was white as snow.
Igor's cousin, 3 times removed Igor, whose fleece was as pink polka-dotted as snow.

color = "white"
get_fleece_color = lambda shoop: shoop + ", whose fleece was as " + color + " as snow."

print[get_fleece_color["Igor"]]

# [... many lines of code later...]

color = "pink polka-dotted"
print[get_fleece_color["Igor's cousin, 3 times removed"]]

Nếu chỉ mục

Igor, whose fleece was white as snow.
Igor's cousin, 3 times removed Igor, whose fleece was as pink polka-dotted as snow.

Nếu bạn cần lấy một lát ở đâu đó ở giữa chuỗi, hãy chỉ định các chỉ mục

Igor, whose fleece was white as snow.
Igor's cousin, 3 times removed Igor, whose fleece was as pink polka-dotted as snow.

Igor, whose fleece was white as snow.
Igor's cousin, 3 times removed Igor, whose fleece was as pink polka-dotted as snow.

Copied!
my_str = 'bobbyhadz.com'

start_index = my_str.index['h']
stop_index = my_str.index['.']

print[my_str[start_index:stop_index]]  # 👉️ hadz

Phương thức str.index trả về chỉ mục của lần xuất hiện đầu tiên của chuỗi con được cung cấp trong chuỗi.

Phương pháp này sẽ tăng

Igor, whose fleece was white as snow.
Igor's cousin, 3 times removed Igor, whose fleece was as pink polka-dotted as snow.

Lưu ý rằng chỉ số

Igor, whose fleece was white as snow.
Igor's cousin, 3 times removed Igor, whose fleece was as pink polka-dotted as snow.

Nếu bạn cần in các ký tự trong một chuỗi và chỉ mục tương ứng, hãy sử dụng hàm

Copied!
my_str = 'bobbyhadz.com'

# ✅ print first character in string
print[my_str[0]]  # 👉️ 'b'

# ✅ print second character in string
print[my_str[1]]  # 👉️ 'o'

# ✅ print last character in string
print[my_str[-1]]  # 👉️ 'm'

# ✅ print first 5 characters in string
print[my_str[:5]]  # 👉️ 'bobby'

# ✅ print last 5 characters in string
print[my_str[-5:]]  # 👉️ 'z.com'

# ✅ print each character and its index in string
for index, char in enumerate[my_str]:
    print[index, char]

import itertools as itts
get_start_of_string = lambda stryng, last, *, itts=itts:\
                          str[itts.takewhile[lambda ch: ch != last, stryng]]
###########################################################
s = "wolfdo65gtornado!salmontiger223"
start_of_string = get_start_of_string[s, "!"]

Hàm liệt kê có thể lặp lại và trả về một đối tượng liệt kê chứa các bộ dữ liệu trong đó phần tử thứ nhất là chỉ mục và thứ hai là mục tương ứng.