如何在Python中删除字符串中的前导空格和尾随空格？
例如:
" Hello " --> "Hello"
" Hello" --> "Hello"
"Hello " --> "Hello"
"Bob has a cat" --> "Bob has a cat"
如何在Python中删除字符串中的前导空格和尾随空格？
例如:
" Hello " --> "Hello"
" Hello" --> "Hello"
"Hello " --> "Hello"
"Bob has a cat" --> "Bob has a cat"
只有一个空格还是所有连续的空格？如果是第二个，则字符串已经有一个.strip()方法:
>>> ' Hello '.strip()
'Hello'
>>> ' Hello'.strip()
'Hello'
>>> 'Bob has a cat'.strip()
'Bob has a cat'
>>> ' Hello '.strip() # ALL consecutive spaces at both ends removed
'Hello'
但是，如果您只需要删除一个空格，则可以使用:
def strip_one_space(s):
if s.endswith(" "): s = s[:-1]
if s.startswith(" "): s = s[1:]
return s
>>> strip_one_space(" Hello ")
' Hello'
此外，请注意，str.strip()也会删除其他空白字符(例如制表符和换行符).要仅删除空格，可以将要删除的字符指定为strip的参数，即:
>>> " Hello\n".strip(" ")
'Hello\n'