in-n-out

Python dependency injection you can taste.
A lightweight dependency injection and result processing framework
for Python using type hints. Emphasis is on simplicity, ease of use,
and minimal impact on source code.
import in_n_out as ino
class Thing:
def __init__(self, name: str):
self.name = name
@ino.inject
def func(thing: Thing):
return thing.name
def give_me_a_thing() -> Thing:
return Thing("Thing")
ino.register_provider(give_me_a_thing)
print(func())
def give_me_another_thing() -> Thing:
return Thing("Another Thing")
with ino.register_provider(give_me_another_thing, weight=10):
print(func())
This also supports processing return values as well
(injection of intentional side effects):
@ino.inject_processors
def func2(thing: Thing) -> str:
return thing.name
def greet_name(name: str):
print(f"Hello, {name}!")
ino.register_processor(greet_name)
func2(Thing('Bob'))
Alternatives
Lots of other python DI frameworks exist, here are a few alternatives to consider: