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https://github.com/ets-labs/python-dependency-injector.git
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53 lines
1.3 KiB
Python
53 lines
1.3 KiB
Python
"""`di.Factory` providers with attribute injections example."""
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import dependency_injector as di
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class User(object):
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"""Example class User."""
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def __init__(self):
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"""Initializer."""
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self.main_photo = None
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self.credit_card = None
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class Photo(object):
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"""Example class Photo."""
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class CreditCard(object):
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"""Example class CreditCard."""
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# User, Photo and CreditCard factories:
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credit_cards_factory = di.Factory(CreditCard)
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photos_factory = di.Factory(Photo)
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users_factory = di.Factory(User,
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di.Attribute('main_photo', photos_factory),
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di.Attribute('credit_card', credit_cards_factory))
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# Creating several User objects:
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user1 = users_factory()
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# Same as: user1 = User()
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# user1.main_photo = Photo()
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# user1.credit_card = CreditCard()
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user2 = users_factory()
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# Same as: user2 = User()
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# user2.main_photo = Photo()
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# user2.credit_card = CreditCard()
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# Making some asserts:
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assert user1 is not user2
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assert isinstance(user1.main_photo, Photo)
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assert isinstance(user1.credit_card, CreditCard)
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assert isinstance(user2.main_photo, Photo)
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assert isinstance(user2.credit_card, CreditCard)
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assert user1.main_photo is not user2.main_photo
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assert user1.credit_card is not user2.credit_card
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