在 Python 中的某个字符处切片字符串

在 Python 中的某个字符处对字符串进行切片

Slice a string at a certain character in Python

要在特定字符处对字符串进行切片：

1. 使用该str.split()方法在字符上拆分字符串。
2. 访问给定索引处的列表。
3. 例如，first = my_str.split('_')[0]。

my_str = 'bobby_hadz_com'

first = my_str.split('_')[0]
print(first)  # 👉️ bobby

second = my_str.split('_')[1]
print(second)  # 👉️ hadz

# ---------------------------------

# 👇️ only split string once

first, second = my_str.split('_', 1)
print(first)  # 👉️ bobby
print(second)  # 👉️ hadz_com

我们使用该str.split()方法在给定字符处对字符串进行切片。

str.split ()
方法使用定界符将字符串拆分为子字符串列表。

my_str = 'bobby_hadz_com'

print(my_str.split('_'))  # 👉️ ['bobby', 'hadz', 'com']

该方法采用以下 2 个参数：

If the separator is not found in the string, a list containing only 1 element is
returned.

We split the string on each underscore in the example, but you can use any other
character.

If you only need to split the string once, set the maxsplit argument to 1 in
the call to str.split().

my_str = 'bobby_hadz_com'

first, second = my_str.split('_', 1)
print(first)  # 👉️ bobby
print(second)  # 👉️ hadz_com

The maxsplit argument can be used to only split the string on the first
occurrence of the given character.

my_str = 'bobby_hadz_com'

# 👇️ ['bobby', 'hadz_com']
print(my_str.split('_', 1))

Note that the str.split() method returns a list containing a single item if
the character is not in the string.

my_str = 'bobby_hadz_com'

print(my_str.split('@'))  # 👉️ ['bobby_hadz_com']

You can use the in operator to check if the character is present in the
string.

my_str = 'bobby_hadz_com'

if '_' in my_str:
    my_list = my_str.split('_')

    first = my_list[0]
    print(first) # 👉️ bobby

    second = my_list[1]
    print(second) # 👉️ hadz

The
in operator
tests for membership. For example, x in s evaluates to True if x is a
member of s, otherwise it evaluates to False.