Advertisements Say, I have a function that should do some internal stuff and display the provided text: def display_text(text: str): … print(text) There’s also a class with a convert() method: class String: def __init__(self, string: str): self.string = string def convert(self): return self.string Now, can you type hint text argument in display_text with String, but… Read More Type conversion using type hinting
Advertisements Microsoft Windows [Version 10.0.19045.3086] (c) Microsoft Corporation. All rights reserved. C:\Users\user>cd C:\Users\user\Desktop\xolo-sniper-recode-main C:\Users\user\Desktop\xolo-sniper-recode-main>python main.py Traceback (most recent call last): File "main.py", line 1, in from typing import final ImportError: cannot import name ‘final’ from ‘typing’ (C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.7_3.7.2544.0_x64__qbz5n2kfra8p0\lib\typing.py) C:\Users\user\Desktop\xolo-sniper-recode-main> i am trying to run a python file named main >Solution : final was added in… Read More ImportError: cannot import name 'final' from 'typing'
Advertisements My typing test is based on a random quote API I found on GitHub, and I want to make a test where the timer/test starts on the first key stroke. Repository link: https://github.com/Tbscuddles/Tbswpmtest >Solution : When the test starts, listen for the keydown event on the <textarea> and start the timer: userInput.addEventListener(‘keydown’, timeReduce, {… Read More How can i make my typing test start once a key is pressed, rather than having to press start button->click textbox->type?
Advertisements Given a Parent class with children ChildA ChildB abstract class Parent { abstract foo() } class ChildA extends Parent { foo() { } bar() { } } class ChildB extends Parent { foo() { } baz() { } } How can I strictly type a function’s parameter as being any class (the class itself,… Read More Annotate type as typeof subclass of base class
Advertisements I remember reading, or hearing somewhere that for a function, input types should be as generic as possible (Iterable over list), but return types should be as specific as possible. Is this written down somewhere official that I can reference when this comes up in team discussions? Or am I crazy and this isn’t… Read More Generic vs Specific MyPy types of functions
Advertisements I’m trying to learn Typescript and for that I came back on some components to convert them into an errorless Typescript file. I have here a bunch of errors that can’t find the cause.I trying different options, but can’t figure it out. The first one is on refs. When I use theme with ref.current,… Read More Typescript error : "audioPlayer.current may be null"
Advertisements Let’s say I have the following two classes: class Literal: pass class Expr: pass class MyClass: def __init__(self, Type:OneOf(Literal, Expr)): pass How would I make the type one of the Expr or Literal class? The full example of what I’m trying to do is as follows: from enum import Enum PrimitiveType = Enum(‘PrimitiveType’, [‘STRING’,… Read More Type one of several classes
Advertisements Is there a pythonic way to constrain the output of a method so that it can only be one of a set? Sort of like typing but for specific values only. I hope you can see what I’m trying to get at with this snippet: class Rule: def evaluate(self, user_id: int) -> {"PASS", "FAIL",… Read More How would I constrain a method to only return one of a set of specific values in python?
Advertisements How do I let TS compiler know a method is in an object? I have a function, purpose of that is check a function is in an object, my expecting is if hasFunction returns true, that means function exist in object that I’m checking, and typescript compiler stop giving me error: function hasFunction(obj: any,… Read More How do I let TS compiler know a function exist in an object?
Advertisements How to use is not type in typescript? example(just an example), I tried to use is not: function notUndef(obj: any): obj is not undefined { return obj !== void(0); } and function notUndef(obj: any): (typeof obj !== undefined) { return obj !== void(0); } but I received two error: Cannot find name ‘not’.ts(2304) ‘{‘… Read More How to use is not type in TypeScript?