Question

我想在python itertools中看到链的源代码，但这是我在源代码中找到的内容？为什么他们都“通过”？

class chain(object):
    """
    chain(*iterables) --> chain object

    Return a chain object whose .__next__() method returns elements from the
    first iterable until it is exhausted, then elements from the next
    iterable, until all of the iterables are exhausted.
    """
    @classmethod
    def from_iterable(cls, iterable): # real signature unknown; restored from __doc__
        """
        chain.from_iterable(iterable) --> chain object

        Alternate chain() contructor taking a single iterable argument
        that evaluates lazily.
        """
        pass

    def __getattribute__(self, *args, **kwargs): # real signature unknown
        """ Return getattr(self, name). """
        pass

    def __init__(self, *iterables): # real signature unknown; restored from __doc__
        pass

    def __iter__(self, *args, **kwargs): # real signature unknown
        """ Implement iter(self). """
        pass

    @staticmethod # known case of __new__
    def __new__(*args, **kwargs): # real signature unknown
        """ Create and return a new object.  See help(type) for accurate signature. """
        pass

Answer 1

你看到的课程可能是另一个模块。 Itertools和许多其他内置函数都是用编译的c编写的。你可以在这里阅读cpython代码 https://github.com/python/cpython/blob/3.6/Modules/itertoolsmodule.c#L1792

在itertools文档中，它声明链函数大致相当于：

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python中链的源代码在哪里？

1 个答案: