Python中用于去除空格的三个函数的使用小结
函数：strip() lstrip() rstrip()
作用：去除字符串中的空格或指定字符
一、默认用法：去除空格
str.strip() ： 去除字符串两边的空格
str.lstrip() ： 去除字符串左边的空格
str.rstrip() ： 去除字符串右边的空格
注：此处的空格包含'\n', '\r', '\t', ' '
默认用法实例
>>> dodo = " hello boy " >>> dodo.strip() 'hello boy' >>> dodo.lstrip() 'hello boy ' >>> dodo.rstrip() ' hello boy'</span>
二、去除指定字符
str.strip('do') ：去除字符串两端指定的字符
str.lstrip('do') ：用于去除左边指定的字符
str.rstrip('do') ：用于去除右边指定的字符
三个函数都可以传入一个参数(这里以'do'为例)，指定要去除的首尾字符，编译器会去除两端所有相应的字符，直到没有匹配的字符
注：
1.去除指定字符时首尾不能出现空格，否则传入参数的时候也需要加入空格
2.指定的字符表示的一种组合，例如'do'表示'dd','do','od','oo','ddd','ooo'等
去除字符实例
>>> dodo = "say hello say boy saaayaaas"
>>> dodo.strip('say')
' hello say boy '
>>> dodo.strip('yas')
' hello say boy '
#当传入的参数中加入空格时
>>> dodo.strip('say ')
'hello say bo'
>>> dodo.lstrip('say')
' hello say boy saaayaaas'
>>> dodo.rstrip('say')
'say hello say boy '
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