[Python-Dev] PEP 362 Third Revision

[Larry Hastings]

On 06/15/2012 04:32 AM, Nick Coghlan wrote:
> Since I don't believe your proposed flag will answer any question that
> actually matters in practice, I consider it useless noise that should
> be dropped from the proposal.

I can cite a situation where it matters in practice: the implementation 
of os.fwalk is effectively gated on hasattr(posix, "openat").  I expect 
to remove openat() in favor of adding a dir_fd parameter to open (see 
issue 14626).


> Now, what a function *could* do is set __signature__ to a Signature
> subclass that provided an additional "validate()" method, or provided
> arbitrary additional information about supported features. That's a
> perfectly reasonable option.

What would the validate() function for os.close do?


//arry/
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