pylance

Import "flask" could not be resolved Pylance

Import "flask" could not be resolved Pylance Question: I am getting this missing import error. I tried installing flask and flask alchemy again but it says requirement satisfied Asked By: Syed Ashiq || Source Answers: Did you install the module? You can do this by for example by writing pip install flask in your command …

Total answers: 1

Achieving interface without inheritance in Python

Achieving interface without inheritance in Python Question: I have a sorted linked list class SortedLinkedList: # … def insert(self, value: int): # … if node.value > value: self.add_before(node, value) # … I would like to generalize the type of values that a Node can hold from only ints to any object that overloads the > …

Total answers: 1

"i is not accessed Pylance". the "i" in for loop doesn't work

"i is not accessed Pylance". the "i" in for loop doesn't work Question: The variables in all of the following for loops says that "variable is not accessed Pylance" The font color of the variable is "dead". if special == "n" and numbers == "n": for i in range(l): password.append(random.choice(chars)) elif special == "y" and …

Total answers: 1

Pylance requiring explicit type on conformant list variables

Pylance requiring explicit type on conformant list variables Question: I define a type as a Union of Literal strings Color = Literal[ "red", "green", "blue", "yellow", "orange", "purple" ] I have a function that expects a list of strings conforming to the type. def f(colors: List[Color]): … I instantiate a list of conformant strings and …

Total answers: 1

"at" sign (@) in Python type hints (suggested by Pylance / Pyright)

"at" sign (@) in Python type hints (suggested by Pylance / Pyright) Question: The July 2022 release of the Python extension for Visual Studio Code introduced "Inlay Type Hints", which automatically suggests return types of functions that don’t have an explicit annotation. To enable it, you can set "python.analysis.inlayHints.functionReturnTypes": true to your IDE user settings …

Total answers: 1

Visual Studio Code is not showing alert for undefined class methods

Visual Studio Code is not showing alert for undefined class methods Question: I am using vscode with Pylance and Pylint, and it does not show an alert for undefined class methods as Pycharm does. Example: Pycharm Visual Studio Code What I tried: Used a different linter (Flake 8) Made sure there are no settings that …

Total answers: 1

mypy slow when using vscode's python extension

mypy slow when using vscode's python extension Question: When enabling mypy in vscode ("python.linting.mypyEnabled": true,), then any manual mypy commands become very slow and CPU intensive (10s before vs 3min after). It seems like the two mypy processes should be independent, or even aid each other through a cache, but they seem to be in …

Total answers: 2

"None" in Python code breaks code suggestions in vscode

"None" in Python code breaks code suggestions in vscode Question: [ This was a bug in vscode < v1.71, see my comment with additional screenshots. ] I’ve got a weird issue in vscode. For some reason, code completion of c. stops working after the first None in the Python code, as shown in below screenshot. …

Total answers: 4

Pylance autocompletion with subclasses

Pylance autocompletion with subclasses Question: The problem is that in the following situation, autocompletion in the SubFoo class does not work in Pylance. Pylance only recognize the methods and attributes of the Bar class inside SubFoo class, but not the methods and attributes of the SubBar class. Am I doing the right thing? class Bar: …

Total answers: 1