[Python-Dev] usefulness of Python version of threading.RLock

Matt Joiner anacrolix at gmail.com
Fri Jan 6 07:11:37 CET 2012

I'm pretty sure the Python version of RLock is in use in several
alternative implementations that provide an alternative _thread.lock. I
think gevent would fall into this camp, as well as a personal project of
mine in a similar vein that operates on python3.

2012/1/6 Charles-François Natali <neologix at free.fr>

> Hi,
> Issue #13697 (http://bugs.python.org/issue13697) deals with a problem
> with the Python version of threading.RLock (a signal handler which
> tries to acquire the same RLock is called right at the wrong time)
> which doesn't affect the C version.
> Whether such a use case can be considered good practise or the best
> way to fix this is not settled yet, but the question that arose to me
> is: "why do we have both a C and Python version?".
> Here's Antoine answer (he suggested to me to bring this up on python-dev":
> """
> The C version is quite recent, and there's a school of thought that we
> should always provide fallback Python implementations.
> (also, arguably a Python implementation makes things easier to
> prototype, although I don't think it's the case for an RLock)
> """
> So, what do you guys think?
> Would it be okay to nuke the Python version?
> Do you have more details on this "school of thought"?
> Also, while we're at it, Victor created #13550 to try to rewrite the
> "logging hack" of the threading module: there again, I think we could
> just remove this logging altogether. What do you think?
> Cheers,
> cf
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