René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Provide common replacement utils / functions many projects will need","articleBody":"Some utility functions I was thinking about:\r\n\r\n```python\r\ndef azip(*iterables):  # Convert any iterables and async iterables into a zipped async iterable\r\n    iterators = [aiter(x) for x in iterables]\r\n\r\n    async def generator():\r\n        while True:\r\n            try:\r\n                yield tuple([await x.__anext__() for x in iterators])\r\n            except StopAsyncIteration:\r\n                break\r\n\r\n    return generator().__aiter__()\r\n\r\ndef aiter(x):  # Convert any iterable or async iterable into an async iterator\r\n    if hasattr(x, \"__aiter__\"):\r\n        return x.__aiter__()\r\n    elif hasattr(x, \"__anext__\"):\r\n        return x\r\n\r\n    async def aiter_wrapper():\r\n        for item in x:\r\n            yield item\r\n\r\n    return aiter_wrapper().__aiter__()\r\n\r\nasync def anext(i):  # Advance an async iterator, good for mapping to `next()`\r\n    return await i.__anext__()\r\n\r\n\r\nasync def await_or_return(x):  # Maps to 'return_()'?\r\n    if iscoroutine(x):\r\n        return await x\r\n    return x\r\n\r\n\r\n# All of the sync variations of the above functions\r\nnext = next\r\niter = iter\r\nzip = zip\r\ndef return_(x):\r\n    return x\r\n```\r\n\r\nCould also have `azip_longest` -\u003e `zip_longest`, etc.\r\n\r\nAll of the `async` functions could be available only on Python 3.6+ so this could be used on projects that support 3.5 or less.\r\n\r\nCould also provide type hints that are effected by `unasync` properly as well.\r\n\r\n```python\r\nAsyncOrSyncIterable[X] = Union[AsyncIterable[X], Iterable[X]]\r\nSyncIterable[X] = Iterable[X]\r\n```\r\n\r\nThis should probably be a separate project to unasync as unasync is primarily a build tool, raising it here because it'd make sense for the tool to live under `python-trio`, maybe `unasync-utils`?","author":{"url":"https://github.com/sethmlarson","@type":"Person","name":"sethmlarson"},"datePublished":"2020-05-07T14:19:27.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/65/unasync/issues/65"}