[issue35247] test.test_socket.RDSTest.testPeek hangs indefinitely
Jáchym Barvínek added the comment: I am experiencing the same issue when trying to build the ArchLinux python package. Not sure how to reproduce, but I can provide specific details of my system if requested. -- nosy: +Jáchym Barvínek ___ Python tracker <https://bugs.python.org/issue35247> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue30196] Add __matmul__ to collections.Counter
New submission from Jáchym Barvínek: The class collections.Counter should semantically contain only numbers, so it makes sense to define dot product od Counters, something like this: def __matmul__(self, other): return sum(self[x] * other[x] for x in self.keys() | other.keys()) I find this useful ocassionaly. -- components: Library (Lib) messages: 292522 nosy: Jáchym Barvínek priority: normal severity: normal status: open title: Add __matmul__ to collections.Counter type: enhancement versions: Python 3.3, Python 3.4, Python 3.5, Python 3.6, Python 3.7 ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue30196> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue28529] 0 ** 0 should raise ArithmeticError
Jáchym Barvínek added the comment: Sorry, It should be 0.0 ** 0 == 0 ** 0.0 == 0.0 ** 0.0 == 1.0 of course. -- ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue28529> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue28529] 0 ** 0 should raise ArithmeticError
New submission from Jáchym Barvínek: 0 ** 0 is mathematically undefined and equivalent to 0/0. 0/0 correctly raises ZeroDivisionError, but 0 ** 0 == 1. Also 0.0 ** 0 == 0 ** 0.0 == 0.0 ** 0.0 == 0.0. Similarly for math.pow. -- components: Interpreter Core messages: 279410 nosy: Jáchym Barvínek priority: normal severity: normal status: open title: 0 ** 0 should raise ArithmeticError versions: Python 3.5 ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue28529> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue27858] Add identity function to functools
Jáchym Barvínek added the comment: Java offers an identity function: https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html 2016-08-25 14:10 GMT+02:00 Steven D'Aprano <rep...@bugs.python.org>: > > Steven D'Aprano added the comment: > > Just in case anyone else thinks this is a good idea, here's a patch. > > -- > keywords: +patch > Added file: https://bugs.python.org/file44218/identity.patch > > ___ > Python tracker <rep...@bugs.python.org> > <https://bugs.python.org/issue27858> > ___ > -- ___ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue27858> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue27858] Add identity function to functools
New submission from Jáchym Barvínek: An identity function is sometimes useful in functional-style programming as a dummy or default value. For example, we can sometimes see a pattern like this (e.g. in itertools.groupby): def f(params, key=None): if key is None: key = lambda x: x ... However, if we had a canonical itentity function: def identity(x): return x we could instead write: def f(params, key=identity): ... and the intended use of the function f and it's functioning would be more obvious simply from it's signature, while also saving a little code. As zen of Python says: Explicit is better than implicit. Of course, we can now write: def f(params, key=lambda x: x): ... but the reason why is not used is probably that it feels a bit awkward to more people than just me. -- components: Library (Lib) messages: 273643 nosy: Jáchym Barvínek priority: normal severity: normal status: open title: Add identity function to functools type: enhancement versions: Python 3.6 ___ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue27858> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
