Python Dependency Injection library
aiodi is a Container for the Dependency Injection in Python.
Installation
Use the package manager pip to install aiodi.
pip install aiodi
Documentation
- Visit aiodi docs.
Usage
from abc import ABC, abstractmethod
from logging import Logger, getLogger, NOTSET, StreamHandler, Formatter
from os import getenv
from aiodi import Container
from typing import Optional, Union
_CONTAINER: Optional[Container] = None
def get_simple_logger(
name: Optional[str] = None,
level: Union[str, int] = NOTSET,
fmt: str = '[%(asctime)s] - %(name)s - %(levelname)s - %(message)s',
) -> Logger:
logger = getLogger(name)
logger.setLevel(level)
handler = StreamHandler()
handler.setLevel(level)
formatter = Formatter(fmt)
handler.setFormatter(formatter)
logger.addHandler(handler)
return logger
class GreetTo(ABC):
@abstractmethod
def __call__(self, who: str) -> None:
pass
class GreetToWithPrint(GreetTo):
def __call__(self, who: str) -> None:
print('Hello ' + who)
class GreetToWithLogger(GreetTo):
_logger: Logger
def __init__(self, logger: Logger) -> None:
self._logger = logger
def __call__(self, who: str) -> None:
self._logger.info('Hello ' + who)
def container() -> Container:
global _CONTAINER
if _CONTAINER:
return _CONTAINER
di = Container({'env': {
'name': getenv('APP_NAME', 'aiodi'),
'log_level': getenv('APP_LEVEL', 'INFO'),
}})
di.resolve([
(
Logger,
get_simple_logger,
{
'name': di.resolve_parameter(lambda di_: di_.get('env.name', typ=str)),
'level': di.resolve_parameter(lambda di_: di_.get('env.log_level', typ=str)),
},
),
(GreetTo, GreetToWithLogger), # -> (GreetTo, GreetToWithLogger, {})
GreetToWithPrint, # -> (GreetToWithPrint, GreetToWithPrint, {})
])
di.set('who', 'World!')
# ...
_CONTAINER = di
return di
def main() -> None:
di = container()
di.get(Logger).info('Just simple call get with the type')
for greet_to in di.get(GreetTo, instance_of=True):
greet_to(di.get('who'))
if __name__ == '__main__':
main()
Requirements
- Python >= 3.6
Contributing
Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
Please make sure to update tests as appropriate.
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