About

Glue code removal. Acetone is a python library to provide inversion of control in situation where other methods are inconvenient or they are not even possible. Or you just like the library.

Usage

Create the acetone container somewhere in your application:

# dependencies.py

from acetone import AcetoneContainer

dependencies = AcetoneContainer()
# or ioc_container
# or lord_of_the_dependencies
# or services

Then use it:

# class_with_dependency.py

from dependencies import dependencies

class ClassWithSomeDependency(object):
    # you can use strings or types as a key
    dependency = dependencies.Dependency('key')

    def use_the_dependency(self):
        self.dependency.dependency_call('argument')

Create a dependency implementation:

# dependency_implementation.py

class DependencyImplementation(object):
    def dependency_call(self, argument):
        print(argument)

Later register the implementation and run it!

# __main__.py

from dependencies import dependencies
from class_with_dependency import ClassWithSomeDependency
from dependency_implementation import DependencyImplementation


if __name__ == '__main__':
    dependency_implementation = DependencyImplementation()
    dependencies.register_instance('key', dependency_implementation)

    instance = ClassWithSomeDependency()
    instance.use_the_dependency()

Or load it from a file:

[
    {
        "name": "key",
        "module": "dependency_implementation",
        "factory": "DependencyImplementation",
        "singleton": true
    }
]

import json
from dependencies import dependencies

def main():
    with open('configuration.json') as file:
        content = json.load(file)
        dependencies.load_from_dicts(content)

    instance = ClassWithSomeDependency()
    instance.use_the_dependency()

Frequently asked questions

class TestXyz(TestCase):
    def tearDown(self):
        container.clean()