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Showing posts with the label Mypy

Exclude Type In Python Typing Annotation

I wrote the following function: def _clean_dict(d): return {k: v for k, v in d.items() if v is … Read more Exclude Type In Python Typing Annotation

Python: All Type Hints Errors In Subclass Constructure Seems Ignored

I have the following code with python type hints It has a bunch of errors. All erros in code are fo… Read more Python: All Type Hints Errors In Subclass Constructure Seems Ignored

How To Use Reveal_type In Mypy

I have read that I can reveal the type of variables by using a function called reveal_type, but I c… Read more How To Use Reveal_type In Mypy

Python Async Decorator Preserve Typing

For the following file: from abc import ABC, abstractmethod from typing import Any, Awaitable, Call… Read more Python Async Decorator Preserve Typing

Type Hint For Return Value In Subclass

I am writing a CustomEnum class in which I want to add some helper methods, that would then be avai… Read more Type Hint For Return Value In Subclass

Type-hinting Parameters With A Sentinel Value As The Default

I currently use this strategy when I cannot assign default arguments in a function's signature … Read more Type-hinting Parameters With A Sentinel Value As The Default

Mypy Error Typevar With Value Restriction And Union Of Unions / Optional Cannot Pass Generic Container Type

So, the following example is obviously contrived but I tried to keep some verisimilitude to my actu… Read more Mypy Error Typevar With Value Restriction And Union Of Unions / Optional Cannot Pass Generic Container Type

What Is The Difference Between Typevar And Newtype?

TypeVar and NewType seem related but I'm not sure when I'm supposed to use each or what the… Read more What Is The Difference Between Typevar And Newtype?

Why Is Mypy Complaining About List Comprehension When It Can't Be Annotated?

Why does Mypy complain that it requires a type annotation for a list comprehension variable, when i… Read more Why Is Mypy Complaining About List Comprehension When It Can't Be Annotated?

How Can I Keep Imports Lightweight And Still Properly Type Annotate?

Tensorflow is a super heavy import. I want to import it only when it's needed. However, I have … Read more How Can I Keep Imports Lightweight And Still Properly Type Annotate?

Incompatible Types In Assignment (expression Has Type "list[]", Variable Has Type (...)

Consider the following self-contained example: from typing import List, Union T_BENCODED_LIST = Un… Read more Incompatible Types In Assignment (expression Has Type "list[]", Variable Has Type (...)

How To Make Mypy Complain About Assigning An Any To An Int

mypy --strict dutifully complains about the following code: from typing import Any, Dict def main(… Read more How To Make Mypy Complain About Assigning An Any To An Int

How To Add Hint To A Factory Method?

I'm looking for a way to annotate return type of a factory function. It returns random child of… Read more How To Add Hint To A Factory Method?

Python Type Hinting: Function Return Type, Given As Argument, But Type Is Generic Alias Like Union

We can specify easily return type of function, even if type we expect is provided as one of it'… Read more Python Type Hinting: Function Return Type, Given As Argument, But Type Is Generic Alias Like Union