pyioc3
Python Inversion of Control (IoC) Container
About
pyioc3 is a lightweight and versatile Inversion of Control (IoC) container for
Python. It simplifies the management of dependencies and enables cleaner, more
modular code by promoting the use of Dependency Injection (DI) patterns. With
pyioc3, you can effortlessly wire up your application's components, specify
their lifecycles, and inject dependencies without the hassle of manual
instantiation.
Key Features
Multiple APIs
pyioc3 offers multiple configuration interfaces including two manual
configuration APIs and a decorator-based autowiring API. These APIs are
flexible, yet simple to use.
Fluent Interface
pyioc3 manual APIs support method chaining to minimize boiler-plate code and
intermediate variables.
Scoped Lifecycles
pyioc3 supports various scopes, including Singleton, Transient, and Requested.
This provides fine-grained control of the lifecycle of your objects.
Predictability
pyioc3 is an immutable ioc container that guarentees predictability of the
dependency tree.
Constuctor Based DI
pyioc3 implements constructor based dependency injection making it easy to drop
into existing applications.
Performance
pyioc3 pre-computes the dependency tree, resulting in fast instantiations to
keep your code fast.
OOP Principles
pyioc3 is designed to improve the maintainability, testability, and flexibility
of your Python applications.
Quick Start
Install the package
pip install --user pyioc3
StaticContainerBuilder API
from pyioc3 import StaticContainerBuilder
container = (
StaticContainerBuilder()
.bind(Duck)
.bind(QuackProvider, Squeak)
.build()
)
duck = container.get(Duck)
duck.quack()
BuilderBase API
from pyioc3.builder import BuilderBase, ProviderBinding
class DuckBuilder(Duck):
def __init__(self):
super().__init__(target_t=Duck)
def with_quack_noise(self, noise: str) -> "DuckBuilder":
self.using_provider(
annotation=QuackProvider,
implementation=DynamicQuackProvider,
on_activate=lambda x: x.set_quack_noise(noise)
)
return self
rubber_duck = (
DuckBuilder()
.with_quack_noise("Squeak")
.build()
)
rubber_duck.quack()
Annotation API
from pyioc3.autowire import bind, AutoWireContainerBuilder
class QuackProvider:
def quack(self):
raise NotImplementedError()
@bind()
class Duck:
def __init__(self, quack: QuackProvider):
self._quack = quack
def quack(self):
self._quack.quack()
@bind(QuackProvider)
class Squeak(QuackProvider):
def quack(self):
print("Squeak")
duck = AutoWireContainerBuilder("my_package").build().get(Duck)
duck.quack()