oliverlambson

Fully-typed python decorators

The right way

from collections.abc import Callable
from functools import wraps


def my_decorator[T, **P](fn: Callable[P, T]) -> Callable[P, T]:

oliverlambson

A click.Date type

What's the problem?

click doesn't have a builtin date type, only a datetime. (They won't be adding one either.)

This litters my cli code with an annoying convert to date chore that I end up using all over the place:

@click.command()

oliverlambson

Rust-style Result type in Python

Lightweight, generic result type à la Rust. (Sometimes you just want errors as values.)

Note: There is a full-on package that does this, with all the other Rust niceties of .unwrap_or(), etc. But if all you need is the basics, this is a zero-dependency approach in like 8 lines of actual code.

from dataclasses import dataclass