1. 模块列表
  2. 函数列表
  3. abc.ABCMeta()

Python abc 模块，ABCMeta() 实例源码

我们从Python开源项目中，提取了以下50个代码示例，用于说明如何使用abc.ABCMeta()。

项目：picoCTF    作者：picoCTF    | 项目源码 | 文件源码 
def challenge_meta(attributes):
    """
    Returns a metaclass that will introduce the given attributes into the class
    namespace.

    Args:
        attributes: The dictionary of attributes

    Returns:
        The metaclass described above
    """

    class ChallengeMeta(ABCMeta):
        def __new__(cls, name, bases, attr):
            attrs = dict(attr)
            attrs.update(attributes)
            return super().__new__(cls, name, bases, attrs)
    return ChallengeMeta
项目：zipline-chinese    作者：zhanghan1990    | 项目源码 | 文件源码 
def setUpClass(cls):
        FinalABCMeta = final_meta_factory(ABCMeta)

        class ABCWithFinal(with_metaclass(FinalABCMeta, object)):
            a = final('ABCWithFinal: a')
            b = 'ABCWithFinal: b'

            @final
            def f(self):
                return 'ABCWithFinal: f'

            def g(self):
                return 'ABCWithFinal: g'

            @abstractmethod
            def h(self):
                raise NotImplementedError('h')

        cls.class_ = ABCWithFinal
项目：noc-orchestrator    作者：DirceuSilvaLabs    | 项目源码 | 文件源码 
def mk_awaitable():
    from abc import abstractmethod, ABCMeta

    @abstractmethod
    def __await__(self):
        yield

    @classmethod
    def __subclasshook__(cls, C):
        if cls is Awaitable:
            for B in C.__mro__:
                if '__await__' in B.__dict__:
                    if B.__dict__['__await__']:
                        return True
                    break
        return NotImplemented

    # calling metaclass directly as syntax differs in Py2/Py3
    Awaitable = ABCMeta('Awaitable', (), {
        '__slots__': (),
        '__await__': __await__,
        '__subclasshook__': __subclasshook__,
    })

    return Awaitable
项目：noc-orchestrator    作者：DirceuSilvaLabs    | 项目源码 | 文件源码 
def mk_awaitable():
    from abc import abstractmethod, ABCMeta

    @abstractmethod
    def __await__(self):
        yield

    @classmethod
    def __subclasshook__(cls, C):
        if cls is Awaitable:
            for B in C.__mro__:
                if '__await__' in B.__dict__:
                    if B.__dict__['__await__']:
                        return True
                    break
        return NotImplemented

    # calling metaclass directly as syntax differs in Py2/Py3
    Awaitable = ABCMeta('Awaitable', (), {
        '__slots__': (),
        '__await__': __await__,
        '__subclasshook__': __subclasshook__,
    })

    return Awaitable
项目：noc-orchestrator    作者：DirceuSilvaLabs    | 项目源码 | 文件源码 
def mk_awaitable():
    from abc import abstractmethod, ABCMeta

    @abstractmethod
    def __await__(self):
        yield

    @classmethod
    def __subclasshook__(cls, C):
        if cls is Awaitable:
            for B in C.__mro__:
                if '__await__' in B.__dict__:
                    if B.__dict__['__await__']:
                        return True
                    break
        return NotImplemented

    # calling metaclass directly as syntax differs in Py2/Py3
    Awaitable = ABCMeta('Awaitable', (), {
        '__slots__': (),
        '__await__': __await__,
        '__subclasshook__': __subclasshook__,
    })

    return Awaitable
项目：picoCTF    作者：royragsdale    | 项目源码 | 文件源码 
def challenge_meta(attributes):
    """
    Returns a metaclass that will introduce the given attributes into the class
    namespace.

    Args:
        attributes: The dictionary of attributes

    Returns:
        The metaclass described above
    """

    class ChallengeMeta(ABCMeta):
        def __new__(cls, name, bases, attr):
            attrs = dict(attr)
            attrs.update(attributes)
            return super().__new__(cls, name, bases, attrs)
    return ChallengeMeta
项目：magic-constraints    作者：huntzhan    | 项目源码 | 文件源码 
def generate_immutable_abc(supercls, mutable_subclass):

    class ABCImmutableMeta(ABCMeta):

        def __subclasscheck__(cls, subclass):
            if not issubclass(subclass, supercls):
                return False
            return not issubclass(subclass, mutable_subclass)

    class ABCImmutable(with_metaclass(ABCImmutableMeta, object)):
        pass

    # dirty hack to assert issubclass(ABCImmutable, supercls).
    supercls._abc_cache.add(ABCImmutable)

    return ABCImmutable
项目：TCP-IP    作者：JackZ0    | 项目源码 | 文件源码 
def __new__(mcs, name, bases, dikt):
        fields = {}

        for base in bases:
            fields.update(getattr(base, '_fields', {}))
        # Do not reorder, this class might override fields from base classes!
        for key, value in tuple(six.iteritems(dikt)):
            # not six.iterkeys() (in-place edit!)
            if isinstance(value, Field):
                fields[key] = dikt.pop(key)

        dikt['_orig_slots'] = dikt.get('__slots__', ())
        dikt['__slots__'] = tuple(
            list(dikt['_orig_slots']) + list(six.iterkeys(fields)))
        dikt['_fields'] = fields

        return abc.ABCMeta.__new__(mcs, name, bases, dikt)
项目：catalyst    作者：enigmampc    | 项目源码 | 文件源码 
def setUpClass(cls):
        FinalABCMeta = compose_types(FinalMeta, ABCMeta)

        class ABCWithFinal(with_metaclass(FinalABCMeta, object)):
            a = final('ABCWithFinal: a')
            b = 'ABCWithFinal: b'

            @final
            def f(self):
                return 'ABCWithFinal: f'

            def g(self):
                return 'ABCWithFinal: g'

            @abstractmethod
            def h(self):
                raise NotImplementedError('h')

        cls.class_ = ABCWithFinal
项目：zippy    作者：securesystemslab    | 项目源码 | 文件源码 
def test_abstractclassmethod_basics(self):
        @abc.abstractclassmethod
        def foo(cls): pass
        self.assertTrue(foo.__isabstractmethod__)
        @classmethod
        def bar(cls): pass
        self.assertFalse(hasattr(bar, "__isabstractmethod__"))

        class C(metaclass=abc.ABCMeta):
            @abc.abstractclassmethod
            def foo(cls): return cls.__name__
        self.assertRaises(TypeError, C)
        class D(C):
            @classmethod
            def foo(cls): return super().foo()
        self.assertEqual(D.foo(), 'D')
        self.assertEqual(D().foo(), 'D')
项目：zippy    作者：securesystemslab    | 项目源码 | 文件源码 
def test_abstractstaticmethod_basics(self):
        @abc.abstractstaticmethod
        def foo(): pass
        self.assertTrue(foo.__isabstractmethod__)
        @staticmethod
        def bar(): pass
        self.assertFalse(hasattr(bar, "__isabstractmethod__"))

        class C(metaclass=abc.ABCMeta):
            @abc.abstractstaticmethod
            def foo(): return 3
        self.assertRaises(TypeError, C)
        class D(C):
            @staticmethod
            def foo(): return 4
        self.assertEqual(D.foo(), 4)
        self.assertEqual(D().foo(), 4)
项目：zippy    作者：securesystemslab    | 项目源码 | 文件源码 
def test_registration_builtins(self):
        class A(metaclass=abc.ABCMeta):
            pass
        A.register(int)
        self.assertIsInstance(42, A)
        self.assertIsInstance(42, (A,))
        self.assertTrue(issubclass(int, A))
        self.assertTrue(issubclass(int, (A,)))
        class B(A):
            pass
        B.register(str)
        class C(str): pass
        self.assertIsInstance("", A)
        self.assertIsInstance("", (A,))
        self.assertTrue(issubclass(str, A))
        self.assertTrue(issubclass(str, (A,)))
        self.assertTrue(issubclass(C, A))
        self.assertTrue(issubclass(C, (A,)))
项目：zippy    作者：securesystemslab    | 项目源码 | 文件源码 
def test_registration_edge_cases(self):
        class A(metaclass=abc.ABCMeta):
            pass
        A.register(A)  # should pass silently
        class A1(A):
            pass
        self.assertRaises(RuntimeError, A1.register, A)  # cycles not allowed
        class B(object):
            pass
        A1.register(B)  # ok
        A1.register(B)  # should pass silently
        class C(A):
            pass
        A.register(C)  # should pass silently
        self.assertRaises(RuntimeError, C.register, A)  # cycles not allowed
        C.register(B)  # ok
项目：zippy    作者：securesystemslab    | 项目源码 | 文件源码 
def test_slots_descriptor(self):
        # Issue2115: slot descriptors did not correctly check
        # the type of the given object
        import abc
        class MyABC(metaclass=abc.ABCMeta):
            __slots__ = "a"

        class Unrelated(object):
            pass
        MyABC.register(Unrelated)

        u = Unrelated()
        self.assertIsInstance(u, MyABC)

        # This used to crash
        self.assertRaises(TypeError, MyABC.a.__set__, u, 3)
项目：zippy    作者：securesystemslab    | 项目源码 | 文件源码 
def test_isabstract(self):
        from abc import ABCMeta, abstractmethod

        class AbstractClassExample(metaclass=ABCMeta):

            @abstractmethod
            def foo(self):
                pass

        class ClassExample(AbstractClassExample):
            def foo(self):
                pass

        a = ClassExample()

        # Test general behaviour.
        self.assertTrue(inspect.isabstract(AbstractClassExample))
        self.assertFalse(inspect.isabstract(ClassExample))
        self.assertFalse(inspect.isabstract(a))
        self.assertFalse(inspect.isabstract(int))
        self.assertFalse(inspect.isabstract(5))
项目：certbot    作者：nikoloskii    | 项目源码 | 文件源码 
def __new__(mcs, name, bases, dikt):
        fields = {}

        for base in bases:
            fields.update(getattr(base, '_fields', {}))
        # Do not reorder, this class might override fields from base classes!
        for key, value in tuple(six.iteritems(dikt)):
            # not six.iterkeys() (in-place edit!)
            if isinstance(value, Field):
                fields[key] = dikt.pop(key)

        dikt['_orig_slots'] = dikt.get('__slots__', ())
        dikt['__slots__'] = tuple(
            list(dikt['_orig_slots']) + list(six.iterkeys(fields)))
        dikt['_fields'] = fields

        return abc.ABCMeta.__new__(mcs, name, bases, dikt)
项目：oil    作者：oilshell    | 项目源码 | 文件源码 
def test_registration_basics(self):
        class A:
            __metaclass__ = abc.ABCMeta
        class B(object):
            pass
        b = B()
        self.assertFalse(issubclass(B, A))
        self.assertFalse(issubclass(B, (A,)))
        self.assertNotIsInstance(b, A)
        self.assertNotIsInstance(b, (A,))
        A.register(B)
        self.assertTrue(issubclass(B, A))
        self.assertTrue(issubclass(B, (A,)))
        self.assertIsInstance(b, A)
        self.assertIsInstance(b, (A,))
        class C(B):
            pass
        c = C()
        self.assertTrue(issubclass(C, A))
        self.assertTrue(issubclass(C, (A,)))
        self.assertIsInstance(c, A)
        self.assertIsInstance(c, (A,))
项目：oil    作者：oilshell    | 项目源码 | 文件源码 
def test_registration_edge_cases(self):
        class A:
            __metaclass__ = abc.ABCMeta
        A.register(A)  # should pass silently
        class A1(A):
            pass
        self.assertRaises(RuntimeError, A1.register, A)  # cycles not allowed
        class B(object):
            pass
        A1.register(B)  # ok
        A1.register(B)  # should pass silently
        class C(A):
            pass
        A.register(C)  # should pass silently
        self.assertRaises(RuntimeError, C.register, A)  # cycles not allowed
        C.register(B)  # ok
项目：oil    作者：oilshell    | 项目源码 | 文件源码 
def test_slots_descriptor(self):
        # Issue2115: slot descriptors did not correctly check
        # the type of the given object
        import abc
        class MyABC:
            __metaclass__ = abc.ABCMeta
            __slots__ = "a"

        class Unrelated(object):
            pass
        MyABC.register(Unrelated)

        u = Unrelated()
        self.assertIsInstance(u, MyABC)

        # This used to crash
        self.assertRaises(TypeError, MyABC.a.__set__, u, 3)
项目：python2-tracer    作者：extremecoders-re    | 项目源码 | 文件源码 
def test_registration_basics(self):
        class A:
            __metaclass__ = abc.ABCMeta
        class B(object):
            pass
        b = B()
        self.assertFalse(issubclass(B, A))
        self.assertFalse(issubclass(B, (A,)))
        self.assertNotIsInstance(b, A)
        self.assertNotIsInstance(b, (A,))
        A.register(B)
        self.assertTrue(issubclass(B, A))
        self.assertTrue(issubclass(B, (A,)))
        self.assertIsInstance(b, A)
        self.assertIsInstance(b, (A,))
        class C(B):
            pass
        c = C()
        self.assertTrue(issubclass(C, A))
        self.assertTrue(issubclass(C, (A,)))
        self.assertIsInstance(c, A)
        self.assertIsInstance(c, (A,))
项目：python2-tracer    作者：extremecoders-re    | 项目源码 | 文件源码 
def test_registration_edge_cases(self):
        class A:
            __metaclass__ = abc.ABCMeta
        A.register(A)  # should pass silently
        class A1(A):
            pass
        self.assertRaises(RuntimeError, A1.register, A)  # cycles not allowed
        class B(object):
            pass
        A1.register(B)  # ok
        A1.register(B)  # should pass silently
        class C(A):
            pass
        A.register(C)  # should pass silently
        self.assertRaises(RuntimeError, C.register, A)  # cycles not allowed
        C.register(B)  # ok
项目：python2-tracer    作者：extremecoders-re    | 项目源码 | 文件源码 
def test_slots_descriptor(self):
        # Issue2115: slot descriptors did not correctly check
        # the type of the given object
        import abc
        class MyABC:
            __metaclass__ = abc.ABCMeta
            __slots__ = "a"

        class Unrelated(object):
            pass
        MyABC.register(Unrelated)

        u = Unrelated()
        self.assertIsInstance(u, MyABC)

        # This used to crash
        self.assertRaises(TypeError, MyABC.a.__set__, u, 3)
项目：My-Web-Server-Framework-With-Python2.7    作者：syjsu    | 项目源码 | 文件源码 
def mk_awaitable():
    from abc import abstractmethod, ABCMeta

    @abstractmethod
    def __await__(self):
        yield

    @classmethod
    def __subclasshook__(cls, C):
        if cls is Awaitable:
            for B in C.__mro__:
                if '__await__' in B.__dict__:
                    if B.__dict__['__await__']:
                        return True
                    break
        return NotImplemented

    # calling metaclass directly as syntax differs in Py2/Py3
    Awaitable = ABCMeta('Awaitable', (), {
        '__slots__': (),
        '__await__': __await__,
        '__subclasshook__': __subclasshook__,
    })

    return Awaitable
项目：web_ctp    作者：molebot    | 项目源码 | 文件源码 
def test_abstractproperty_basics(self):
        @abc.abstractproperty
        def foo(self): pass
        self.assertTrue(foo.__isabstractmethod__)
        def bar(self): pass
        self.assertFalse(hasattr(bar, "__isabstractmethod__"))

        class C(metaclass=abc.ABCMeta):
            @abc.abstractproperty
            def foo(self): return 3
        self.assertRaises(TypeError, C)
        class D(C):
            @property
            def foo(self): return super().foo
        self.assertEqual(D().foo, 3)
        self.assertFalse(getattr(D.foo, "__isabstractmethod__", False))
项目：web_ctp    作者：molebot    | 项目源码 | 文件源码 
def test_abstractclassmethod_basics(self):
        @abc.abstractclassmethod
        def foo(cls): pass
        self.assertTrue(foo.__isabstractmethod__)
        @classmethod
        def bar(cls): pass
        self.assertFalse(getattr(bar, "__isabstractmethod__", False))

        class C(metaclass=abc.ABCMeta):
            @abc.abstractclassmethod
            def foo(cls): return cls.__name__
        self.assertRaises(TypeError, C)
        class D(C):
            @classmethod
            def foo(cls): return super().foo()
        self.assertEqual(D.foo(), 'D')
        self.assertEqual(D().foo(), 'D')
项目：web_ctp    作者：molebot    | 项目源码 | 文件源码 
def test_abstractproperty_basics(self):
        @property
        @abc.abstractmethod
        def foo(self): pass
        self.assertTrue(foo.__isabstractmethod__)
        def bar(self): pass
        self.assertFalse(getattr(bar, "__isabstractmethod__", False))

        class C(metaclass=abc.ABCMeta):
            @property
            @abc.abstractmethod
            def foo(self): return 3
        self.assertRaises(TypeError, C)
        class D(C):
            @C.foo.getter
            def foo(self): return super().foo
        self.assertEqual(D().foo, 3)
项目：web_ctp    作者：molebot    | 项目源码 | 文件源码 
def test_abstractclassmethod_basics(self):
        @classmethod
        @abc.abstractmethod
        def foo(cls): pass
        self.assertTrue(foo.__isabstractmethod__)
        @classmethod
        def bar(cls): pass
        self.assertFalse(getattr(bar, "__isabstractmethod__", False))

        class C(metaclass=abc.ABCMeta):
            @classmethod
            @abc.abstractmethod
            def foo(cls): return cls.__name__
        self.assertRaises(TypeError, C)
        class D(C):
            @classmethod
            def foo(cls): return super().foo()
        self.assertEqual(D.foo(), 'D')
        self.assertEqual(D().foo(), 'D')
项目：web_ctp    作者：molebot    | 项目源码 | 文件源码 
def test_abstractstaticmethod_basics(self):
        @staticmethod
        @abc.abstractmethod
        def foo(): pass
        self.assertTrue(foo.__isabstractmethod__)
        @staticmethod
        def bar(): pass
        self.assertFalse(getattr(bar, "__isabstractmethod__", False))

        class C(metaclass=abc.ABCMeta):
            @staticmethod
            @abc.abstractmethod
            def foo(): return 3
        self.assertRaises(TypeError, C)
        class D(C):
            @staticmethod
            def foo(): return 4
        self.assertEqual(D.foo(), 4)
        self.assertEqual(D().foo(), 4)
项目：web_ctp    作者：molebot    | 项目源码 | 文件源码 
def test_registration_basics(self):
        class A(metaclass=abc.ABCMeta):
            pass
        class B(object):
            pass
        b = B()
        self.assertFalse(issubclass(B, A))
        self.assertFalse(issubclass(B, (A,)))
        self.assertNotIsInstance(b, A)
        self.assertNotIsInstance(b, (A,))
        B1 = A.register(B)
        self.assertTrue(issubclass(B, A))
        self.assertTrue(issubclass(B, (A,)))
        self.assertIsInstance(b, A)
        self.assertIsInstance(b, (A,))
        self.assertIs(B1, B)
        class C(B):
            pass
        c = C()
        self.assertTrue(issubclass(C, A))
        self.assertTrue(issubclass(C, (A,)))
        self.assertIsInstance(c, A)
        self.assertIsInstance(c, (A,))
项目：web_ctp    作者：molebot    | 项目源码 | 文件源码 
def test_register_as_class_deco(self):
        class A(metaclass=abc.ABCMeta):
            pass
        @A.register
        class B(object):
            pass
        b = B()
        self.assertTrue(issubclass(B, A))
        self.assertTrue(issubclass(B, (A,)))
        self.assertIsInstance(b, A)
        self.assertIsInstance(b, (A,))
        @A.register
        class C(B):
            pass
        c = C()
        self.assertTrue(issubclass(C, A))
        self.assertTrue(issubclass(C, (A,)))
        self.assertIsInstance(c, A)
        self.assertIsInstance(c, (A,))
        self.assertIs(C, A.register(C))
项目：web_ctp    作者：molebot    | 项目源码 | 文件源码 
def test_registration_builtins(self):
        class A(metaclass=abc.ABCMeta):
            pass
        A.register(int)
        self.assertIsInstance(42, A)
        self.assertIsInstance(42, (A,))
        self.assertTrue(issubclass(int, A))
        self.assertTrue(issubclass(int, (A,)))
        class B(A):
            pass
        B.register(str)
        class C(str): pass
        self.assertIsInstance("", A)
        self.assertIsInstance("", (A,))
        self.assertTrue(issubclass(str, A))
        self.assertTrue(issubclass(str, (A,)))
        self.assertTrue(issubclass(C, A))
        self.assertTrue(issubclass(C, (A,)))
项目：web_ctp    作者：molebot    | 项目源码 | 文件源码 
def test_slots_descriptor(self):
        # Issue2115: slot descriptors did not correctly check
        # the type of the given object
        import abc
        class MyABC(metaclass=abc.ABCMeta):
            __slots__ = "a"

        class Unrelated(object):
            pass
        MyABC.register(Unrelated)

        u = Unrelated()
        self.assertIsInstance(u, MyABC)

        # This used to crash
        self.assertRaises(TypeError, MyABC.a.__set__, u, 3)
项目：pefile.pypy    作者：cloudtracer    | 项目源码 | 文件源码 
def test_registration_basics(self):
        class A:
            __metaclass__ = abc.ABCMeta
        class B(object):
            pass
        b = B()
        self.assertFalse(issubclass(B, A))
        self.assertFalse(issubclass(B, (A,)))
        self.assertNotIsInstance(b, A)
        self.assertNotIsInstance(b, (A,))
        A.register(B)
        self.assertTrue(issubclass(B, A))
        self.assertTrue(issubclass(B, (A,)))
        self.assertIsInstance(b, A)
        self.assertIsInstance(b, (A,))
        class C(B):
            pass
        c = C()
        self.assertTrue(issubclass(C, A))
        self.assertTrue(issubclass(C, (A,)))
        self.assertIsInstance(c, A)
        self.assertIsInstance(c, (A,))
项目：pefile.pypy    作者：cloudtracer    | 项目源码 | 文件源码 
def test_registration_edge_cases(self):
        class A:
            __metaclass__ = abc.ABCMeta
        A.register(A)  # should pass silently
        class A1(A):
            pass
        self.assertRaises(RuntimeError, A1.register, A)  # cycles not allowed
        class B(object):
            pass
        A1.register(B)  # ok
        A1.register(B)  # should pass silently
        class C(A):
            pass
        A.register(C)  # should pass silently
        self.assertRaises(RuntimeError, C.register, A)  # cycles not allowed
        C.register(B)  # ok
项目：pefile.pypy    作者：cloudtracer    | 项目源码 | 文件源码 
def test_slots_descriptor(self):
        # Issue2115: slot descriptors did not correctly check
        # the type of the given object
        import abc
        class MyABC:
            __metaclass__ = abc.ABCMeta
            __slots__ = "a"

        class Unrelated(object):
            pass
        MyABC.register(Unrelated)

        u = Unrelated()
        self.assertIsInstance(u, MyABC)

        # This used to crash
        self.assertRaises(TypeError, MyABC.a.__set__, u, 3)
项目：ouroboros    作者：pybee    | 项目源码 | 文件源码 
def test_abstractproperty_basics(self):
        @abc.abstractproperty
        def foo(self): pass
        self.assertTrue(foo.__isabstractmethod__)
        def bar(self): pass
        self.assertFalse(hasattr(bar, "__isabstractmethod__"))

        class C(metaclass=abc.ABCMeta):
            @abc.abstractproperty
            def foo(self): return 3
        self.assertRaises(TypeError, C)
        class D(C):
            @property
            def foo(self): return super().foo
        self.assertEqual(D().foo, 3)
        self.assertFalse(getattr(D.foo, "__isabstractmethod__", False))
项目：ouroboros    作者：pybee    | 项目源码 | 文件源码 
def test_abstractclassmethod_basics(self):
        @abc.abstractclassmethod
        def foo(cls): pass
        self.assertTrue(foo.__isabstractmethod__)
        @classmethod
        def bar(cls): pass
        self.assertFalse(getattr(bar, "__isabstractmethod__", False))

        class C(metaclass=abc.ABCMeta):
            @abc.abstractclassmethod
            def foo(cls): return cls.__name__
        self.assertRaises(TypeError, C)
        class D(C):
            @classmethod
            def foo(cls): return super().foo()
        self.assertEqual(D.foo(), 'D')
        self.assertEqual(D().foo(), 'D')
项目：ouroboros    作者：pybee    | 项目源码 | 文件源码 
def test_abstractstaticmethod_basics(self):
        @abc.abstractstaticmethod
        def foo(): pass
        self.assertTrue(foo.__isabstractmethod__)
        @staticmethod
        def bar(): pass
        self.assertFalse(getattr(bar, "__isabstractmethod__", False))

        class C(metaclass=abc.ABCMeta):
            @abc.abstractstaticmethod
            def foo(): return 3
        self.assertRaises(TypeError, C)
        class D(C):
            @staticmethod
            def foo(): return 4
        self.assertEqual(D.foo(), 4)
        self.assertEqual(D().foo(), 4)
项目：ouroboros    作者：pybee    | 项目源码 | 文件源码 
def test_abstractproperty_basics(self):
        @property
        @abc.abstractmethod
        def foo(self): pass
        self.assertTrue(foo.__isabstractmethod__)
        def bar(self): pass
        self.assertFalse(getattr(bar, "__isabstractmethod__", False))

        class C(metaclass=abc.ABCMeta):
            @property
            @abc.abstractmethod
            def foo(self): return 3
        self.assertRaises(TypeError, C)
        class D(C):
            @C.foo.getter
            def foo(self): return super().foo
        self.assertEqual(D().foo, 3)
项目：ouroboros    作者：pybee    | 项目源码 | 文件源码 
def test_abstractstaticmethod_basics(self):
        @staticmethod
        @abc.abstractmethod
        def foo(): pass
        self.assertTrue(foo.__isabstractmethod__)
        @staticmethod
        def bar(): pass
        self.assertFalse(getattr(bar, "__isabstractmethod__", False))

        class C(metaclass=abc.ABCMeta):
            @staticmethod
            @abc.abstractmethod
            def foo(): return 3
        self.assertRaises(TypeError, C)
        class D(C):
            @staticmethod
            def foo(): return 4
        self.assertEqual(D.foo(), 4)
        self.assertEqual(D().foo(), 4)
项目：ouroboros    作者：pybee    | 项目源码 | 文件源码 
def test_register_as_class_deco(self):
        class A(metaclass=abc.ABCMeta):
            pass
        @A.register
        class B(object):
            pass
        b = B()
        self.assertTrue(issubclass(B, A))
        self.assertTrue(issubclass(B, (A,)))
        self.assertIsInstance(b, A)
        self.assertIsInstance(b, (A,))
        @A.register
        class C(B):
            pass
        c = C()
        self.assertTrue(issubclass(C, A))
        self.assertTrue(issubclass(C, (A,)))
        self.assertIsInstance(c, A)
        self.assertIsInstance(c, (A,))
        self.assertIs(C, A.register(C))
项目：ouroboros    作者：pybee    | 项目源码 | 文件源码 
def test_registration_builtins(self):
        class A(metaclass=abc.ABCMeta):
            pass
        A.register(int)
        self.assertIsInstance(42, A)
        self.assertIsInstance(42, (A,))
        self.assertTrue(issubclass(int, A))
        self.assertTrue(issubclass(int, (A,)))
        class B(A):
            pass
        B.register(str)
        class C(str): pass
        self.assertIsInstance("", A)
        self.assertIsInstance("", (A,))
        self.assertTrue(issubclass(str, A))
        self.assertTrue(issubclass(str, (A,)))
        self.assertTrue(issubclass(C, A))
        self.assertTrue(issubclass(C, (A,)))
项目：ouroboros    作者：pybee    | 项目源码 | 文件源码 
def test_registration_edge_cases(self):
        class A(metaclass=abc.ABCMeta):
            pass
        A.register(A)  # should pass silently
        class A1(A):
            pass
        self.assertRaises(RuntimeError, A1.register, A)  # cycles not allowed
        class B(object):
            pass
        A1.register(B)  # ok
        A1.register(B)  # should pass silently
        class C(A):
            pass
        A.register(C)  # should pass silently
        self.assertRaises(RuntimeError, C.register, A)  # cycles not allowed
        C.register(B)  # ok
项目：ouroboros    作者：pybee    | 项目源码 | 文件源码 
def test_slots_descriptor(self):
        # Issue2115: slot descriptors did not correctly check
        # the type of the given object
        import abc
        class MyABC(metaclass=abc.ABCMeta):
            __slots__ = "a"

        class Unrelated(object):
            pass
        MyABC.register(Unrelated)

        u = Unrelated()
        self.assertIsInstance(u, MyABC)

        # This used to crash
        self.assertRaises(TypeError, MyABC.a.__set__, u, 3)
项目：ndk-python    作者：gittor    | 项目源码 | 文件源码 
def test_registration_basics(self):
        class A:
            __metaclass__ = abc.ABCMeta
        class B(object):
            pass
        b = B()
        self.assertFalse(issubclass(B, A))
        self.assertFalse(issubclass(B, (A,)))
        self.assertNotIsInstance(b, A)
        self.assertNotIsInstance(b, (A,))
        A.register(B)
        self.assertTrue(issubclass(B, A))
        self.assertTrue(issubclass(B, (A,)))
        self.assertIsInstance(b, A)
        self.assertIsInstance(b, (A,))
        class C(B):
            pass
        c = C()
        self.assertTrue(issubclass(C, A))
        self.assertTrue(issubclass(C, (A,)))
        self.assertIsInstance(c, A)
        self.assertIsInstance(c, (A,))
项目：ndk-python    作者：gittor    | 项目源码 | 文件源码 
def test_registration_edge_cases(self):
        class A:
            __metaclass__ = abc.ABCMeta
        A.register(A)  # should pass silently
        class A1(A):
            pass
        self.assertRaises(RuntimeError, A1.register, A)  # cycles not allowed
        class B(object):
            pass
        A1.register(B)  # ok
        A1.register(B)  # should pass silently
        class C(A):
            pass
        A.register(C)  # should pass silently
        self.assertRaises(RuntimeError, C.register, A)  # cycles not allowed
        C.register(B)  # ok
项目：ndk-python    作者：gittor    | 项目源码 | 文件源码 
def test_slots_descriptor(self):
        # Issue2115: slot descriptors did not correctly check
        # the type of the given object
        import abc
        class MyABC:
            __metaclass__ = abc.ABCMeta
            __slots__ = "a"

        class Unrelated(object):
            pass
        MyABC.register(Unrelated)

        u = Unrelated()
        self.assertIsInstance(u, MyABC)

        # This used to crash
        self.assertRaises(TypeError, MyABC.a.__set__, u, 3)
项目：teleport    作者：eomsoft    | 项目源码 | 文件源码 
def mk_awaitable():
    from abc import abstractmethod, ABCMeta

    @abstractmethod
    def __await__(self):
        yield

    @classmethod
    def __subclasshook__(cls, C):
        if cls is Awaitable:
            for B in C.__mro__:
                if '__await__' in B.__dict__:
                    if B.__dict__['__await__']:
                        return True
                    break
        return NotImplemented

    # calling metaclass directly as syntax differs in Py2/Py3
    Awaitable = ABCMeta('Awaitable', (), {
        '__slots__': (),
        '__await__': __await__,
        '__subclasshook__': __subclasshook__,
    })

    return Awaitable
项目：pure_interface    作者：aranzgeo    | 项目源码 | 文件源码 
def _type_is_pure_interface(cls):
    """ Return True if cls is a pure interface or an empty ABC class"""
    if cls is object:
        return False
    if hasattr(cls, '_pi'):
        return cls._pi.type_is_pure_interface
    if issubclass(type(cls), abc.ABCMeta):
        for attr, value in six.iteritems(cls.__dict__):
            if _builtin_attrs(attr):
                continue
            if callable(value):
                if not _is_empty_function(value):
                    return False
            elif isinstance(value, property):
                for func in (value.fget, value.fset, value.fdel):
                    if func is not None and not _is_empty_function(func):
                        return False
        return True

    return False
项目：kbe_server    作者：xiaohaoppy    | 项目源码 | 文件源码 
def test_abstractproperty_basics(self):
        @abc.abstractproperty
        def foo(self): pass
        self.assertTrue(foo.__isabstractmethod__)
        def bar(self): pass
        self.assertFalse(hasattr(bar, "__isabstractmethod__"))

        class C(metaclass=abc.ABCMeta):
            @abc.abstractproperty
            def foo(self): return 3
        self.assertRaises(TypeError, C)
        class D(C):
            @property
            def foo(self): return super().foo
        self.assertEqual(D().foo, 3)
        self.assertFalse(getattr(D.foo, "__isabstractmethod__", False))