iterables.py 文件源码

def tee(self, num=2):
        # type: (int) -> IterableWrapper
        """ Return copies of this generator.

            Proxy to itertools.tee().

           If you want to concatenate the results afterwards, use
           g() * x instead of g().tee(x) which does that for you.

            Args:
                num: The number of returned generators.

            Example:

                >>> from ww import g
                >>> a, b, c = g(range(3)).tee(3)
                >>> [tuple(a), tuple(b), tuple(c)]
                [(0, 1, 2), (0, 1, 2), (0, 1, 2)]
        """
        cls = self.__class__
        gen = cls(cls(x) for x in itertools.tee(self.iterator, num))
        self._tee_called = True
        return gen

    # TODO: allow negative end boundary