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Description:

aiodi 1.1.4

Python Dependency Injection library
aiodi is a modern Python Dependency Injection library that allows you to standardize and centralize the way objects are constructed in your application highly inspired on PHP Symfony's DependencyInjection Component.
Key Features:

Native-based: Implements PEP 621 storing project metadata in pyproject.toml.
Dual mode: Setting dependencies using Python and using configuration files.
Clean: Wherever you want just use it, no more decorators and defaults everywhere.

Installation
Use the package manager pip to install aiodi.
pip install aiodi

Documentation

Visit aiodi docs.

Usage
with Configuration Files
# sample/pyproject.toml

[tool.aiodi.variables]
name = "%env(str:APP_NAME, 'sample')%"
version = "%env(int:APP_VERSION, '1')%"
log_level = "%env(APP_LEVEL, 'INFO')%"
debug = "%env(bool:int:APP_DEBUG, '0')%"
text = "Hello World"

[tool.aiodi.services."_defaults"]
project_dir = "../../.."

[tool.aiodi.services."logging.Logger"]
class = "sample.libs.utils.get_simple_logger"
arguments = { name = "%var(name)%", level = "%var(log_level)%" }

[tool.aiodi.services."UserLogger"]
type = "sample.libs.users.infrastructure.in_memory_user_logger.InMemoryUserLogger"
arguments = { commands = "@logging.Logger" }

[tool.aiodi.services."*"]
_defaults = { autoregistration = { resource = "sample/libs/*", exclude = "sample/libs/users/{domain,infrastructure/in_memory_user_logger.py,infrastructure/*command.py}" } }

# sample/apps/settings.py

from typing import Optional
from aiodi import Container, ContainerBuilder

def container(filename: str, cwd: Optional[str] = None) -> Container:
return ContainerBuilder(filenames=[filename], cwd=cwd).load()

# sample/apps/cli/main.py

from sample.apps.settings import container
from logging import Logger

def main() -> None:
di = container(filename='../../pyproject.toml')

di.get(Logger).info('Just simple call get with the type')
di.get('UserLogger').logger().info('Just simple call get with the service name')

with Python
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 >= 3.7

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.
License
MIT