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extmod/asyncio: Emit errors to stderr, not stdout.

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Sometimes these are different file descriptors, not to mention the Unix
port, so use stderr to distinguish these error messages.

CPython prints to stdout, but it does it via a call to the logging module.
We don't want to introduce a dependency on logging, so printing to stderr
is a good alternative.  One can override default_exception_handler() if
needed.
This commit is contained in:
Matthias Urlichs 2023-10-06 21:03:24 +02:00 committed by Damien George
parent 05cb1406ad
commit 5f0bd33b73
1 changed files with 3 additions and 3 deletions
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6
extmod/asyncio/core.py
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@ -272,9 +272,9 @@ class Loop:
return Loop._exc_handler
def default_exception_handler(loop, context):
print(context["message"])
print("future:", context["future"], "coro=", context["future"].coro)
sys.print_exception(context["exception"])
print(context["message"], file=sys.stderr)
print("future:", context["future"], "coro=", context["future"].coro, file=sys.stderr)
sys.print_exception(context["exception"], sys.stderr)
def call_exception_handler(context):
(Loop._exc_handler or Loop.default_exception_handler)(Loop, context)