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：
代码如下:
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：
代码如下:
in [12]: x=’yxyxyxxxyy hello xyxyxyy’
in [13]: print x.strip(‘xy’)
hello