The delimiter according which to split the string. None (the default value) means split according to any whitespace, and discard empty strings from the result. maxsplit Maximum number of splits to do. -1 (the d
sep The delimiter according which to split the string. None (the default value) means split according to any whitespace, and discard empty strings from the result. maxsplit Maximum number of splits to do. -1 (the default value) means no limit....
Lastly, an important application of strings is thesplitmethod, which returns a list of all the words in the initial string and it automatically splits by any white space. It can optionally take a parameter and split the strings by another character, like a comma or a dot 4. Formatting str...
它们调用obj.__format__(format_spec)以获取使用特殊格式代码的对象的字符串显示。我们将在下一个示例中介绍__bytes__,然后介绍__format__。 警告 如果您从 Python 2 转换而来,请记住,在 Python 3 中,__repr__,__str__和__format__必须始终返回 Unicode 字符串(类型str)。 只有__bytes__应该返回字节序...
The delimiter according which to split the string.None(the default value) means split according toanywhitespace,anddiscard empty stringsfromthe result. maxsplit Maximum number of splits to do. -1(the default value) means no limit.
>>> '1,2,,3,'.split(',') ['1', '2', '', '3', ''] If sep is not specified or is None, a different splitting algorithm is applied: runs of consecutive whitespace are regarded as a single separator, and the result will contain no empty strings at the start or end if the ...
Vector2d来自示例 11-1,在vector2d_v0.py中实现(示例 11-2)。 该代码基于示例 1-2,除了+和*操作的方法,我们稍后会看到在第十六章中。 我们将添加==方法,因为它对于测试很有用。 到目前为止,Vector2d使用了几个特殊方法来提供 Pythonista 在设计良好的对象中期望的操作。
s.split(‘delim’) —— 返回一个以给定分隔符分离出来的子字符串组成的列表。分隔符不是一个正则表达式,它仅仅是文本。’aaa,bbb,ccc’.split(‘,’) -> [‘aaa’, ‘bbb’, ‘ccc’]。一个方便的方法:s.split()(没有参数)可以以空格字符将字符串分离开来。
可以理解为把str前后chars替换为None 12 13 str.lstrip([chars]) #把str前面的去掉 14 15 str.rstrip([chars]) #把str后面的去掉 16 17 str.expandtabs([tabsize]) #把str中的tab字符替换没空格,每个tab替换为tabsize个空格,默认是8个 18 19 str.split([sep, [maxsplit]]) #以sep为分隔符,把str...
Consequently, splitting an empty string or a string consisting of just whitespace with a None separator returns []. If sep is given, consecutive delimiters are not grouped together and are deemed to delimit empty strings (for example, '1,,2'.split(',') returns ['1', '', '2']). ...