mirror of
https://github.com/ets-labs/python-dependency-injector.git
synced 2024-11-28 20:44:01 +03:00
43 lines
1.1 KiB
Python
43 lines
1.1 KiB
Python
"""Callable provider examples."""
|
|
|
|
from objects.catalog import AbstractCatalog
|
|
|
|
from objects.providers import Singleton
|
|
from objects.providers import Callable
|
|
|
|
from objects.injections import KwArg
|
|
from objects.injections import Attribute
|
|
|
|
import sqlite3
|
|
|
|
|
|
def consuming_function(arg, db):
|
|
"""Example function that has input arg and dependency on database."""
|
|
return arg, db
|
|
|
|
|
|
class Catalog(AbstractCatalog):
|
|
|
|
"""Catalog of objects providers."""
|
|
|
|
database = Singleton(sqlite3.Connection,
|
|
KwArg('database', ':memory:'),
|
|
Attribute('row_factory', sqlite3.Row))
|
|
""":type: (objects.Provider) -> sqlite3.Connection"""
|
|
|
|
consuming_function = Callable(consuming_function,
|
|
KwArg('db', database))
|
|
""":type: (objects.Provider) -> consuming_function"""
|
|
|
|
|
|
# Some calls.
|
|
arg1, db1 = Catalog.consuming_function(1)
|
|
arg2, db2 = Catalog.consuming_function(2)
|
|
arg3, db3 = Catalog.consuming_function(3)
|
|
|
|
# Some asserts.
|
|
assert db1 is db2 is db3
|
|
assert arg1 == 1
|
|
assert arg2 == 2
|
|
assert arg3 == 3
|