下面的英文说明是官方给出:
string.strip(s[, chars])
Return a copy of the string with leadingand trailing characters removed. If chars is omitted orNone, whitespace characters are removed. If given and not None, chars must be astring; the characters in the string will be stripped from the both ends of thestring this method is called on.
如果chars被忽略或者是None,空白字符串被移除。如果chars不是None并存在,在字符串的头尾的chars都将被移除。
Changed in version 2.2.3: The charsparameter was added. The chars parameter cannot be passed in earlier 2.2versions.
下面例子中字符以tab抬头,以空格结尾。
line=‘ hello happybks! ‘
print ‘*‘+line.strip()+‘*‘
print ‘*‘+line.strip(‘ ‘)+‘*‘
print ‘*‘+line.strip(‘ ‘)+‘*‘
print ‘*‘+line.strip(‘h‘)+‘*‘
输出结果如下:
*hello happybks!*
*hello happybks!*
*hello happybks!*
* hello happybks! *
可以发现不传参数,则会把字符串开头和结尾的空格、tab全部删除,中间的空格和tab不会
传空格或者tab参数,子串传仍然会把字符串开头和结尾的无论空格还是tab都一并删除
当传入的参数是其他参数时,字符串开头结尾不是该参数字符串,则没有任何效果
但是如果字符串的开头和结尾是其他字符串,并且传入的参数也是这个字符串,那么会将字符串开头和结尾的参数串全部清掉,无论有多少个。但是区分大小写。
例如,下面的例子:
line2=‘haaaaahhaaaaaaahHhhh‘
print ‘*‘+line2.strip(‘h‘)+‘*‘
结果输出:
*aaaaahhaaaaaaahH*