去除字符串两段空格
目的
获得一个首尾不含多余空格的字符串
?
方法
可以使用字符串的以下方法处理：
string.lstrip(s[, chars])Return a copy of the string with leading 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 beginning of the string this method is called on.
string.rstrip(s[, chars])Return a copy of the string with 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 end of the string this method is called on.
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.
?
?具体的效果如下：
In?[10]:?x='?????Hi,Jack!????????'In?[11]:?print?'|',x.lstrip(),'|',x.rstrip(),'|',x.strip(),'|'
|?Hi,Jack!?????????|??????Hi,Jack!?|?Hi,Jack!?|
?
?其中提供的参数chars用来删除特定的符号，注意空格并没有被移除，例如：
In?[12]:?x='yxyxyxxxyy?Hello?xyxyxyy'In?[13]:?print?x.strip('xy')
?Hello
?
?
?
?
?
?