>>> a = r'aaa\ccc' >>> a 'aaa\\ccc' >>> a.split('\\') ['aaa', 'ccc'] >>> ''.join(a.split('\\')) 'aaaccc' >>> b 'aaa\\ccc' >>> a 'aaa\\ccc' >>> c = a + '\\' + 'ddd' >>> c 'aaa\\ccc\\ddd' >>> d = c + '\\' + 'eee' >>> d 'aaa\\ccc\\ddd\\eee' >>> b = '/'.join(a.split('\\')) >>> b 'aaa/ccc' >>> 手动换行的。。。