injection

How does that work?

injection makes it possible to hook into variable name lookup via inserting a special key into scope dictionaries.

Example

from functools import partial
from random import randint

from injection import inject

roll: int
inject("roll", into=locals(), factory=partial(randint, 1, 6))

print(roll, type(roll) is int)  # 6 True
print(roll, type(roll) is int)  # 4 True
print(roll, type(roll) is int)  # 3 True

# you never know what the value of roll will be!

It could be used for various purposes, for instance as a robust replacement for Flask's local proxies or to implement pure-Python PEP 690 that would import things on first reference.

Legal Info

© Copyright by Bartosz Sławecki (@bswck).
This software is licensed under the terms of MIT License.