python中如何删除空格

strip()：删除字符串前后的空白。

lstrip()：删除字符串前面（左边）的空白。

rstrip()：删除字符串后面（右边）的空白。

>>> help(str.lstrip)

Help on method_descriptor:

lstrip(...)

    S.lstrip([chars]) -> str

    Return a copy of the string S with leading whitespace removed.

    If chars is given and not None, remove characters in chars instead.

>>>

s = '  this is a puppy  '

# 删除左边的空白

print(s.lstrip())

# 删除右边的空白

print(s.rstrip())

# 删除两边的空白

print(s.strip())

# 再次输出s，将会看到s并没有改变

print(s)

s2 = 'i think it is a scarecrow'

# 删除左边的i、t、o、w字符

print(s2.lstrip('itow'))

# 删除右边的i、t、o、w字符

print(s2.rstrip('itow'))

# 删除两边的i、t、o、w字符

print(s2.strip('itow'))

think it is a scarecrow

i think it is a scarecr

think it is a scarecr