Mailman 3 August 2021 - Python-ideas

startswith() and endswith() methods returning the matched value
by fgallaire＠gmail.com Aug. 10, 2021

Aug. 10, 2021

This is a proposal to change the behaviour of the startswith() and endswith() methods for str, bytes and bytearray objects, making them return the matched value instead of the True boolean. Here a str example with the endswith() method: domain = "python.org" if domain.endswith(".fr"): print(".fr") elif domain.endswith(".com"): print(".com") elif domain.endswith("org"): print(".org") With the ".org" non-empty str returned by the endswith() method instead of the True boolean, the … [View More]

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Proposal: Python Native bindings for OpenAPI
by Vaideeswaran Ganesan Aug. 9, 2021

Aug. 9, 2021

OpenAPI (https://spec.openapis.org/oas/latest.html) is an emerging standard for defining RESTful interfaces. OpenAPI is supported by swagger - which provides tools to convert an OpenAPI spec into python code (for both backend as well as client). The proposition I have is to make OpenAPI native to python. Essentially, this involves some of the following: 1. OpenAPI provides definitions of objects, arrays, structures, primitive types, collections etc. 2. OpenAPI supports object creation (HTTPS … [View More]

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Argparse.add_argument() argument for additional functionallity
by Hasan Aliyev Aug. 8, 2021

Aug. 8, 2021

Hi. I would like to suggest to add functionality to argparse For example we can have one ArgumentParser instance, for (windows, linux), (community edition, pro edition) apps. It could give ability to show and be able to run only allowed commands based on version of os, app or some other logic. import argparse def some_callable(): if edition() == 'pro_edition': return True return False parser = argparse.ArgumentParser( prog="CustomProgramm", description="… [View More]

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`not not x` much faster than `bool(x)`
by wyz23x2＠163.com Aug. 6, 2021

Aug. 6, 2021

Before the introduction of bool and also in other languages, `not not x` was/is used to convert to True (1) and False (0). However, the old way is still much faster than bool(x) or even operator.truth(x). Test: > py -3.10 -m timeit -s "objects = 1, 0, -0.0, "20", "False", 93, 28.569, [], set(), {1: 5}" "[(not not x) for x in objects]" 200000 loops, best of 5: 1.12 usec per loop > py -3.10 -m timeit -s "objects = 1, 0, -0.0, "20", "False", 93, 28.569, [], set(), {1: 5}" "[(bool(x)) for x … [View More]

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More natural type hints for built-in containers
by Ignacio Pickering Aug. 1, 2021

Aug. 1, 2021

Currently type hints for built-in containers are, in my opinion, less succint than required. I suspect it is probably not very difficult for a type checker to interpret something like this for example: var1: {str: (int, int)} = {"label": (1, 2)} var2: {str} = {"other_label"} def function(param1: {int: str} = {1: "foo"}, param2: (int, ...) = (1, 2, 3)) -> (int, (str, ...)): return 3, ("foo", "bar") as equivalent to: var1: dict[str, tuple[int, int]] = {"label": (1, 2)} var2: set[str] = … [View More]

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Possibility to specify port in __init__ of ftplib.FTP
by Marty July 31, 2021

July 31, 2021

Hi. If there is possible to connect and login to ftp server within __init__, I think it would make sense to add parameter **port** in ftplib.FTP. It could look like this: ``` def __init__(self, host='', port=0, user='', passwd='', acct='', timeout=_GLOBAL_DEFAULT_TIMEOUT, source_address=None, *, encoding='utf-8'): self.encoding = encoding self.source_address = source_address self.timeout = timeout if host: self.connect(host, port) … [View More]

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