1.7 注释

随着学习的深入,用不了多久,你就可以写复杂的上千甚至上万行的代码啦,有些代码你花了很久写出来,过了些天再回去看,发现竟然看不懂了,哈哈,这太正常了。 另外,你以后在工作中会发现,一个项目多是由几个甚至几十个开发人员一起做,你要调用别人写的代码,别人也要用你的,如果代码不加注释,你自己都看不懂,更别说别人了,这样写会挨打的。所以为了避免这种尴尬的事情发生,一定要增加你代码的可读性。

代码注释分单行和多行注释, 单行注释用#,多行注释可以用三对双引号“”” “””

下面给大家看一段标准代码的注释,忽略代码意思

def subclass_exception(name, parents, module, attached_to=None):
    """
    Create exception subclass. Used by ModelBase below.
    If 'attached_to' is supplied, the exception will be created in a way that
    allows it to be pickled, assuming the returned exception class will be added
    as an attribute to the 'attached_to' class.
    """
    class_dict = {'__module__': module}
    if attached_to is not None:
        def __reduce__(self):
            # Exceptions are special - they've got state that isn't
            # in self.__dict__. We assume it is all in self.args.
            return (unpickle_inner_exception, (attached_to, name), self.args)
        def __setstate__(self, args):
            self.args = args
        class_dict['__reduce__'] = __reduce__
        class_dict['__setstate__'] = __setstate__
    return type(name, parents, class_dict)

代码注释原则:

  1. 不用给全部代码加注释,只需要在自己觉得重要或不好理解的部分加注释即可

  2. 注释可以用中文或英文,但绝对不要拼音噢

  3. 注释不光要给自己看,还要给别人看,所以请认真写

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