Mailman 3 May 2017 - Python-ideas

Suggestion: Add shutil.get_dir_size
by Ram Rachum May 3, 2017

May 3, 2017

Hi, I have a suggestion: Add a function shutil.get_dir_size that gets the size of a directory, including all the items inside it recursively. I currently need this functionality and it looks like I'll have to write my own function for it. Cheers, Ram.

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Augmented assignment syntax for objects.
by Erik May 2, 2017

May 2, 2017

Hi. I suspect that this may have been discussed to death at some point in the past, but I've done some searching and I didn't come up with much. Apologies if I'm rehashing an old argument ;) I often find myself writing __init__ methods of the form: def __init__(self, foo, bar, baz, spam, ham): self.foo = foo self.bar = bar self.baz = baz self.spam = spam self.ham = ham This seems a little wordy and uses a lot of vertical space on the screen. Occasionally, I have considered … [View More]

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Proposed PEP 484 addition: describe a way of annotating decorated declarations
by Guido van Rossum May 1, 2017

May 1, 2017

There's a PR to the peps proposal here: https://github.com/python/peps/pull/242 The full text of the current proposal is below. The motivation for this is that for complex decorators, even if the type checker can figure out what's going on (by taking the signature of the decorator into account), it's sometimes helpful to the human reader of the code to be reminded of the type after applying the decorators (or a stack thereof). Much discussion can be found in the PR. Note that we ended up … [View More]

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Decorators for running a function in a Process or Thread
by NoxDaFox May 1, 2017

May 1, 2017

The decorators would abstract the logic of spawning a process or thread and maintaining its lifecycle. I think it could be a good fit for the `concurrent.futures` module. Decorated functions would return a `Future` object and run the logic in a separate thread or process. @concurrent.futures.thread def function(arg, kwarg=0): return arg + kwarg future = function(1, kwarg=2) future.result() The Process decorator in particular would support use cases such as running unstable code within … [View More]

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