Light ioc container for you
Project description
pyject
What is Pyject?
Pyject is a IocContainer for Python.
It helps implementing the dependency injection principle.
Installation
The package is available on the PyPi:
pip install pyjectt
Examples
- Base
- Non-default types
Base
from abc import ABC, abstractmethod
from typing import List
from pyject import Container
class DuckInterface(ABC):
@abstractmethod
def quack(self):
raise NotImplementedError()
class QuackBehavior(ABC):
@abstractmethod
def quack(self):
raise NotImplementedError()
class Sqeak(QuackBehavior):
def quack(self):
return "Quack_1"
class DuckA(DuckInterface):
def __init__(self, squeak: QuackBehavior):
self._quack_behavior = squeak
def quack(self):
return self._quack_behavior.quack()
class DuckC(DuckInterface):
def quack(self):
return "Quack_2"
container = Container()
container.add_singleton(QuackBehavior, Sqeak)
container.add_transient(DuckInterface, DuckA)
container.add_singleton(DuckInterface, DuckC)
duck = container.get(DuckInterface)
print(duck.quack())
ducks = container.get_all(DuckInterface)
for duck in ducks:
print(duck.quack())
def test2(ducks: List[DuckInterface]):
result_ = ""
for duck in ducks:
result_ += duck.quack()
return result_
assert container.resolve(test2) == "Quack_1Quack_2"
Non-default types
Sequence
def list_typing(ducks: List[DuckInterface]):
result_ = ""
for duck in ducks:
result_ += duck.quack()
return result_
def sequence_typing(ducks: Sequence[DuckInterface]):
result_ = ""
for duck in ducks:
result_ += duck.quack()
return result_
assert container.resolve(list_typing) == "Quack_1Quack_2"
assert container.resolve(sequence_typing) == "Quack_1Quack_2"
Union
def union_typing(quack: Union[QuackBehavior, DuckInterface]):
return quack
def optional_typing(test: Optional[List]):
return test
assert isinstance(container.resolve(union_typing), QuackBehavior)
assert container.resolve(optional_typing) is None
ForwardRef
from pyject.types import ForwardRef
class Test:
def __init__(self, test2: ForwardRef["Test2"]):
self.test2 = test2
def test(self):
return self.test2.test2()
class Test2:
def __init__(self, test: ForwardRef[Test]):
self.test = test
def test2(self):
return "123"
container.add_singleton(Test, Test)
container.add_singleton(Test2, Test2)
test = container.get(Test)
assert isinstance(test, Test)
assert isinstance(test.test2, ForwardRef)
assert isinstance(test.test2.test, ForwardRef)
assert test.test() == "123"
assert test.test() == test.test2.test2()
Iterator
def iterator_typing(ducks: Iterator[DuckInterface]):
result_ = ""
for duck in ducks:
result_ += duck.quack()
return result_
assert container.resolve(iterator_typing) == "Quack_1Quack_2"
Project details
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