Python strip lstrip rstrip使用方法
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strip lstrip rstrip使用方法
Python中的strip用于去除字符串的首尾字符,同理,lstrip用于去除左边的字符,rstrip用于去除右边的字符。 string.strip(s[, chars]) Return a copy of the string with leading and trailing characters removed. If chars is omitted or None, whitespace characters are removed. If given and not None, chars must be a string; the characters in the string will be stripped from the both ends of the string this method is called on. Changed in version 2.2.3: The chars parameter was added. The chars parameter cannot be passed in earlier 2.2 versions. 这三个函数都可传入一个参数,指定要去除的首尾字符。 需要注意的是,传入的是一个字符数组,编译器去除两端所有相应的字符,直到没有匹配的字符,比如: theString = 'saaaay yes no yaaaass' print theString.strip('say') theString依次被去除首尾在['s','a','y']数组内的字符,直到字符在不数组内。所以,输出的结果为: yes no 比较简单吧,lstrip和rstrip原理是一样的。 注意:当没有传入参数时,是默认去除首尾空格的。 theString = 'saaaay yes no yaaaass' print theString.strip('say') print theString.strip('say ') #say后面有空格 print theString.lstrip('say') print theString.rstrip('say') 运行结果: yes no es no yes no yaaaass saaaay yes no
参考
https://docs.python.org/2/library/stdtypes.html?highlight=strip#str.strip https://docs.python.org/2/library/string.html?highlight=strip#string.strip
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