On Tuesday, September 15, 2015 at 11:11:52 AM UTC-5, Edward K. Ream wrote:

TL;DR: I am unlikely to be interested enough in type checking for Python.

> I'm looking for a problem that a) seems impossible and b) hasn't been 
significantly studied.

[big snip]

> Over the last few years I have tried in vain to understand how various 
type-checking/inference algorithms have worked...It seems that I need 
better tools to understand the code.

I doubt that better tools can take the place of understanding relevant 
theory ;-)

My interest in Python's type hints is waning rapidly.  Progress on the 
project is well along, and certainly does not need my "help".  For 
instance, I understand none of the related type hinting issues 
<https://github.com/ambv/typehinting/issues>.  Happily, Guide is on top of 
things :-)

Perhaps more importantly, type hinting/checking could be a mixed blessing, 
as discussed here <https://github.com/ambv/typehinting/issues>.  And a 
troubling type loophole 
<https://github.com/ambv/typehinting/blob/master/VARIANCE.rst> casts 
further doubts on the project.

In short, I'm probably not qualified to contribute anything to the pep 484 
<https://www.python.org/dev/peps/pep-0484/> project, and even if the 
project succeeds, it will add nothing to Leo.  So looking elsewhere for a 
"big" project seems appropriate.

Edward

P.S.  Having said all this, I *am* curious about how various type-related 
problems will be solved, so it's possible I'll start a conversation with 
the lead devs.

EKR

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