[Python-ideas] Flagging blocking functions not to be used with asyncio

[Yury Selivanov]

On 2016-10-07 11:16 AM, Guido van Rossum wrote:

> Maybe a simpler approach would be to write a linter that checks for a
> known list of common blocking functions, and anything that calls those
> automatically gets the same property?

What if somebody uses logging module and logs to a file?  I think this 
is something that linters can't infer (how logging is configured).

One way to solve this would be to monkeypatch the io and os modules 
(gevent does that, so it's possible) to issue a warning when it's used 
in an asyncio context.  This can be done as a module on PyPI.

Another way would be to add some kind of IO tracing hooks to CPython.

Yury