1。删除前后的空白字符

>>> str = “ a b c d “

>>> str.strip()

‘a b c d’

2。删除左边的空白

>>> str = “ a b c d “

>>> str.lstrip()

‘a b c d ‘

3。删除右边的空白

>>> str = “ a b c d “

>>> str.rstrip()

‘ a b c d’