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https://github.com/ets-labs/python-dependency-injector.git
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46 lines
1.0 KiB
Python
46 lines
1.0 KiB
Python
"""`Factory` providers with init injections example."""
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from objects.providers import Factory
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from objects.injections import KwArg
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class A(object):
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"""Example class A.
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Class A has dependencies on class B and class C objects, that have to be
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provided as init arguments.
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"""
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def __init__(self, object_b, object_c):
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self.object_b = object_b
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self.object_c = object_c
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super(A, self).__init__()
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class B(object):
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"""Example class B."""
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class C(object):
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"""Example class C."""
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# A, B, C factories:
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c_factory = Factory(C)
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b_factory = Factory(B)
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a_factory = Factory(A,
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KwArg('object_b', b_factory),
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KwArg('object_c', c_factory))
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# Creating several A objects:
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object_a_1 = a_factory() # Same as: A(object_b=B(), object_c=C())
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object_a_2 = a_factory() # Same as: A(object_b=B(), object_c=C())
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# Making some asserts:
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assert object_a_1 is not object_a_2
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assert object_a_1.object_b is not object_a_2.object_b
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assert object_a_1.object_c is not object_a_2.object_c
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