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https://github.com/ets-labs/python-dependency-injector.git
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Add implementation and tests
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@ -35,6 +35,7 @@ cdef class Delegate(Provider):
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cdef class Dependency(Provider):
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cdef class Dependency(Provider):
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cdef object __instance_of
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cdef object __instance_of
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cdef object __default
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cdef class ExternalDependency(Dependency):
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cdef class ExternalDependency(Dependency):
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@ -82,9 +82,11 @@ class Delegate(Provider[Provider]):
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class Dependency(Provider[T]):
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class Dependency(Provider[T]):
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def __init__(self, instance_of: Type[T] = object) -> None: ...
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def __init__(self, instance_of: Type[T] = object, default: Optional[Union[Provider, Any]] = None) -> None: ...
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@property
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@property
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def instance_of(self) -> Type[T]: ...
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def instance_of(self) -> Type[T]: ...
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@property
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def default(self) -> Provider[T]: ...
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def provided_by(self, provider: Provider) -> OverridingContext: ...
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def provided_by(self, provider: Provider) -> OverridingContext: ...
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@ -12,7 +12,6 @@ import sys
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import types
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import types
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import threading
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import threading
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import warnings
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import warnings
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import weakref
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try:
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try:
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import asyncio
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import asyncio
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@ -525,7 +524,7 @@ cdef class Dependency(Provider):
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:type: type
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:type: type
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"""
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"""
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def __init__(self, object instance_of=object):
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def __init__(self, object instance_of=object, default=UNDEFINED):
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"""Initializer."""
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"""Initializer."""
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if not isinstance(instance_of, CLASS_TYPES):
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if not isinstance(instance_of, CLASS_TYPES):
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raise TypeError(
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raise TypeError(
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@ -534,8 +533,12 @@ cdef class Dependency(Provider):
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instance_of,
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instance_of,
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)
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)
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)
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)
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self.__instance_of = instance_of
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self.__instance_of = instance_of
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if default is not UNDEFINED and not isinstance(default, Provider):
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default = Object(default)
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self.__default = default
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super(Dependency, self).__init__()
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super(Dependency, self).__init__()
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def __deepcopy__(self, memo):
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def __deepcopy__(self, memo):
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@ -544,7 +547,8 @@ cdef class Dependency(Provider):
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if copied is not None:
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if copied is not None:
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return copied
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return copied
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copied = self.__class__(self.__instance_of)
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copied_default = deepcopy(self.__default, memo) if self.__default is not UNDEFINED else UNDEFINED
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copied = self.__class__(self.__instance_of, copied_default)
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self._copy_overridings(copied, memo)
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self._copy_overridings(copied, memo)
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@ -557,12 +561,13 @@ cdef class Dependency(Provider):
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:rtype: object
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:rtype: object
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"""
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"""
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if self.__last_overriding is None:
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if self.__last_overriding:
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result = self.__last_overriding(*args, **kwargs)
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elif not self.__last_overriding and self.__default is not UNDEFINED:
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result = self.__default(*args, **kwargs)
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else:
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raise Error('Dependency is not defined')
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raise Error('Dependency is not defined')
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result = self.__last_overriding(*args, **kwargs)
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if self.is_async_mode_disabled():
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if self.is_async_mode_disabled():
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self._check_instance_type(result)
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self._check_instance_type(result)
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return result
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return result
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@ -609,6 +614,11 @@ cdef class Dependency(Provider):
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"""Return class of required dependency."""
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"""Return class of required dependency."""
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return self.__instance_of
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return self.__instance_of
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@property
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def default(self):
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"""Return default provider."""
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return self.__default
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def provided_by(self, provider):
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def provided_by(self, provider):
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"""Set external dependency provider.
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"""Set external dependency provider.
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@ -271,6 +271,25 @@ class DependencyTests(unittest.TestCase):
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def test_provided_instance_provider(self):
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def test_provided_instance_provider(self):
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self.assertIsInstance(self.provider.provided, providers.ProvidedInstance)
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self.assertIsInstance(self.provider.provided, providers.ProvidedInstance)
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def test_default(self):
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provider = providers.Dependency(instance_of=dict, default={'foo': 'bar'})
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self.assertEqual(provider(), {'foo': 'bar'})
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def test_default_attribute(self):
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provider = providers.Dependency(instance_of=dict, default={'foo': 'bar'})
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self.assertEqual(provider.default(), {'foo': 'bar'})
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def test_default_provider(self):
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provider = providers.Dependency(instance_of=dict, default=providers.Factory(dict, foo='bar'))
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self.assertEqual(provider.default(), {'foo': 'bar'})
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def test_default_attribute_provider(self):
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default = providers.Factory(dict, foo='bar')
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provider = providers.Dependency(instance_of=dict, default=default)
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self.assertEqual(provider.default(), {'foo': 'bar'})
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self.assertIs(provider.default, default)
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def test_call_overridden(self):
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def test_call_overridden(self):
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self.provider.provided_by(providers.Factory(list))
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self.provider.provided_by(providers.Factory(list))
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self.assertIsInstance(self.provider(), list)
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self.assertIsInstance(self.provider(), list)
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@ -314,6 +333,62 @@ class DependencyTests(unittest.TestCase):
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self.assertIsNot(overriding_provider, overriding_provider_copy)
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self.assertIsNot(overriding_provider, overriding_provider_copy)
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self.assertIsInstance(overriding_provider_copy, providers.Provider)
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self.assertIsInstance(overriding_provider_copy, providers.Provider)
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def test_deep_copy_default_object(self):
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default = {'foo': 'bar'}
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provider = providers.Dependency(dict, default=default)
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provider_copy = providers.deepcopy(provider)
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self.assertIs(provider_copy(), default)
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self.assertIs(provider_copy.default(), default)
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def test_deep_copy_default_provider(self):
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bar = object()
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default = providers.Factory(dict, foo=providers.Object(bar))
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provider = providers.Dependency(dict, default=default)
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provider_copy = providers.deepcopy(provider)
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self.assertEqual(provider_copy(), {'foo': bar})
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self.assertEqual(provider_copy.default(), {'foo': bar})
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self.assertIs(provider_copy()['foo'], bar)
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def test_with_container_default_object(self):
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default = {'foo': 'bar'}
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class Container(containers.DeclarativeContainer):
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provider = providers.Dependency(dict, default=default)
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container = Container()
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self.assertIs(container.provider(), default)
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self.assertIs(container.provider.default(), default)
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def test_with_container_default_provider(self):
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bar = object()
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class Container(containers.DeclarativeContainer):
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provider = providers.Dependency(dict, default=providers.Factory(dict, foo=providers.Object(bar)))
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container = Container()
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self.assertEqual(container.provider(), {'foo': bar})
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self.assertEqual(container.provider.default(), {'foo': bar})
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self.assertIs(container.provider()['foo'], bar)
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def test_with_container_default_provider_with_overriding(self):
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bar = object()
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baz = object()
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class Container(containers.DeclarativeContainer):
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provider = providers.Dependency(dict, default=providers.Factory(dict, foo=providers.Object(bar)))
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container = Container(provider=providers.Factory(dict, foo=providers.Object(baz)))
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self.assertEqual(container.provider(), {'foo': baz})
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self.assertEqual(container.provider.default(), {'foo': bar})
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self.assertIs(container.provider()['foo'], baz)
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def test_repr(self):
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def test_repr(self):
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self.assertEqual(repr(self.provider),
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self.assertEqual(repr(self.provider),
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'<dependency_injector.providers.'
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'<dependency_injector.providers.'
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