Mailman 3 February 2022 - Python-ideas

Generics alternative syntax
by Abdulla Al Kathiri Feb. 9, 2022

Feb. 9, 2022

Hello all, Sorry to bother you again with the generic thing. Golang will soon release a new version with Generics. I like their way of doing it. Like Rust, they don’t bother with TypeVars. It makes you wonder why we are not doing something similar in Python. [T: Type] ——> T is invariant and Type is the bound. [T] is Ok. [T_co:: Type] ——> T is covariant and Type is the bound. [T_co::] is Ok. [T_contra::: Type] —-> T is contravariant and Type is the bound . [T_contra:::] is Ok. Or … [View More]

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New Web Interface Library For Python?
by Abdur-Rahmaan Janhangeer Feb. 8, 2022

Feb. 8, 2022

Greetings list, Here is a nobody proposing something to be picked up by more skilled people. The urllib deprecation thread is scary for many reasons. I cannot just ignore it as it affects me as a noob user. The security issues makes one think if we continue shipping something that always has known open holes, can we sleep soundly? On the other hand, removing the library completely is weird. How can programming be fun if it does not provide 'internet'-related libraries? Heu, should users … [View More]

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ConfigParser: typed ExtendedInterpolation
by Paul Korir Feb. 8, 2022

Feb. 8, 2022

Consider the following config file: [section] some_var = 1 [other_section] other_var = ${section:some_var} My idea would be to have an optional additional argument to perform some implied arithmetic e.g. [other_section] other_var = ${section:some_var:int} + 1 Thoughts? Paul

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Consider moving abstract method checking logic from ABCMeta into object
by Neil Girdhar Feb. 8, 2022

Feb. 8, 2022

Currently, some type checkers rightly complain that a method is decorated with abc.abstractmethod when the class's type does not inherit from ABCMeta. Adding a metaclass is a fairly heavy dependency since you're forced to poison all of your other metaclasses with the same base metaclass. It also brings in possibly unwanted type registration that ABC comes with. Now that abstractmethod's usage is extremely well-understood, would it make sense to move the checking logic out of ABCMeta? … [View More]

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Literal type alternative syntax
by Abdulla Al Kathiri Feb. 5, 2022

Feb. 5, 2022

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Unit variables upon their first appearance
by Mirmojtaba Gharibi Feb. 5, 2022

Feb. 5, 2022

Hello there, I have an idea for initializing a variable the first time it’s created; it can especially be helpful with containers, and dicts specifically. Let me demonstrate with some examples: Dic = {} # format fruit:count for fruit in fruits: If fruit in Dic: Dic[fruit]+=1 Else: Dic[fruit]=1 With my proposal, using := to init (similar to how in math parlance, the := is used for defining something for the first time) Dic = {} # format fruit:count For fruit in fruits: … [View More]

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Adding sortedconatiners to Python or merge the ideas?
by Abdur-Rahmaan Janhangeer Feb. 3, 2022

Feb. 3, 2022

Greetings, This library* seems to be used by many people for some treemap operations. Would it be a good idea to include it in upcoming versions? Leetcode has it by default for the lack of a similar something in Python. I did not check, but it seems other languages cater to structures better. * http://www.grantjenks.com/docs/sortedcontainers/ Thanks. Kind Regards, Abdur-Rahmaan Janhangeer about <https://compileralchemy.github.io/> | blog <https://www.pythonkitchen.com> github &… [View More]

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