需要原地修改字符串，可以使用io.StringIO对象或array模块
>>> a = "wukong,dasheng" >>> import io >>> sio = io.StringIO(a) >>> sio <_io.StringIO object at 0x000001F591E599D0> >>> sio.getvalue() 'wukong,dasheng' >>> sio.seek (7) 7 >>> sio.write ("%") 1 >>> sio.getvalue() 'wukong,%asheng' >>>