mirror of
https://github.com/ets-labs/python-dependency-injector.git
synced 2024-11-22 17:47:02 +03:00
50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
"""`Catalog.override()` example."""
|
|
|
|
from collections import namedtuple
|
|
|
|
from dependency_injector.catalog import AbstractCatalog
|
|
from dependency_injector.providers import Factory
|
|
from dependency_injector.injections import KwArg
|
|
|
|
|
|
# Creating some example classes:
|
|
Object1 = namedtuple('Object1', ['arg1', 'arg2'])
|
|
Object2 = namedtuple('Object2', ['object1'])
|
|
ExtendedObject2 = namedtuple('ExtendedObject2', [])
|
|
|
|
|
|
class Catalog(AbstractCatalog):
|
|
|
|
"""Providers catalog."""
|
|
|
|
object1_factory = Factory(Object1,
|
|
KwArg('arg1', 1),
|
|
KwArg('arg2', 2))
|
|
""":type: (dependency_injector.Provider) -> Object1"""
|
|
|
|
object2_factory = Factory(Object2,
|
|
KwArg('object1', object1_factory))
|
|
""":type: (dependency_injector.Provider) -> Object2"""
|
|
|
|
|
|
class AnotherCatalog(AbstractCatalog):
|
|
|
|
"""Another providers catalog."""
|
|
|
|
object2_factory = Factory(ExtendedObject2)
|
|
""":type: (dependency_injector.Provider) -> ExtendedObject2"""
|
|
|
|
|
|
# Overriding `Catalog` with `AnotherCatalog`:
|
|
Catalog.override(AnotherCatalog)
|
|
|
|
# Creating some dependency_injector using overridden catalog:
|
|
object2_1 = Catalog.object2_factory()
|
|
object2_2 = Catalog.object2_factory()
|
|
|
|
# Making some asserts:
|
|
assert object2_1 is not object2_2
|
|
|
|
assert isinstance(object2_1, ExtendedObject2)
|
|
assert isinstance(object2_2, ExtendedObject2)
|