Andrew Svetlov <andrew.svet...@gmail.com> added the comment:
I still think that iscoroutinefunction should not be used for async/sync
decoration type autodetection.
A day ago stuck with a case when decorator used iscoroutinefunction() for
separation but returned a regular function wrapper that returns awaitable in
turn.
As a result, the transparent decorator which should not modify a decorated
function signature cannot be applied twice, e.g.
@retry
@retry
async def fetch():
...
This is very confusing behavior, the obvious fix is providing `sync_retry` and
`async_retry` decorators to never mix the behavior.
Seems very close to the problem discussed here.
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue37398>
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