def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
sig = signature(getattr(iface, method))
actual = signature(getattr(klass, method))
if sig != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, sig, actual
)
)
python类abstractproperty()的实例源码
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
sig = signature(getattr(iface, method))
actual = signature(getattr(klass, method))
if sig != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, sig, actual
)
)
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
sig = signature(getattr(iface, method))
actual = signature(getattr(klass, method))
if sig != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, sig, actual
)
)
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
sig = signature(getattr(iface, method))
actual = signature(getattr(klass, method))
if sig != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, sig, actual
)
)
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
sig = signature(getattr(iface, method))
actual = signature(getattr(klass, method))
if sig != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, sig, actual
)
)
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
spec = inspect.getargspec(getattr(iface, method))
actual = inspect.getargspec(getattr(klass, method))
if spec != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, spec, actual
)
)
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
sig = signature(getattr(iface, method))
actual = signature(getattr(klass, method))
if sig != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, sig, actual
)
)
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
sig = signature(getattr(iface, method))
actual = signature(getattr(klass, method))
if sig != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, sig, actual
)
)
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
spec = inspect.getargspec(getattr(iface, method))
actual = inspect.getargspec(getattr(klass, method))
if spec != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, spec, actual
)
)
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))
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
sig = signature(getattr(iface, method))
actual = signature(getattr(klass, method))
if sig != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, sig, actual
)
)
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
sig = signature(getattr(iface, method))
actual = signature(getattr(klass, method))
if sig != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, sig, actual
)
)
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
sig = signature(getattr(iface, method))
actual = signature(getattr(klass, method))
if sig != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, sig, actual
)
)
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
spec = inspect.getargspec(getattr(iface, method))
actual = inspect.getargspec(getattr(klass, method))
if spec != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, spec, actual
)
)
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))
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
sig = signature(getattr(iface, method))
actual = signature(getattr(klass, method))
if sig != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, sig, actual
)
)
def _patch_properties(cls, base_abstract_properties):
""" Create an AttributeProperty for interface properties not provided by an implementation.
"""
abstract_properties = set()
functions = []
for attr in cls.__abstractmethods__:
value = getattr(cls, attr)
if isinstance(value, abstractproperty):
functions.extend([value.fget, value.fset, value.fdel]) # may contain Nones
setattr(cls, attr, AttributeProperty(attr))
abstract_properties.add(attr)
cls._pi.abstractproperties = frozenset(abstract_properties | base_abstract_properties)
abstractmethods = set(cls.__abstractmethods__) - abstract_properties
for func in functions:
if func is not None and func.__name__ in abstractmethods:
abstractmethods.discard(func.__name__)
cls.__abstractmethods__ = frozenset(abstractmethods)
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))
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
sig = signature(getattr(iface, method))
actual = signature(getattr(klass, method))
if sig != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, sig, actual
)
)
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
sig = signature(getattr(iface, method))
actual = signature(getattr(klass, method))
if sig != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, sig, actual
)
)
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
sig = signature(getattr(iface, method))
actual = signature(getattr(klass, method))
if sig != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, sig, actual
)
)
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
spec = inspect.getargspec(getattr(iface, method))
actual = inspect.getargspec(getattr(klass, method))
if spec != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, spec, actual
)
)
def verify_interface(iface, klass):
for method in iface.__abstractmethods__:
if not hasattr(klass, method):
raise InterfaceNotImplemented(
"{0} is missing a {1!r} method".format(klass, method)
)
if isinstance(getattr(iface, method), abc.abstractproperty):
# Can't properly verify these yet.
continue
sig = signature(getattr(iface, method))
actual = signature(getattr(klass, method))
if sig != actual:
raise InterfaceNotImplemented(
"{0}.{1}'s signature differs from the expected. Expected: "
"{2!r}. Received: {3!r}".format(
klass, method, sig, actual
)
)
def __new__(mcls, name, bases, namespace):
fields = namespace.get('_fields')
for base in bases:
if fields is not None:
break
fields = getattr(base, '_fields', None)
if not isinstance(fields, abstractproperty):
basetuple = _namedtuple(name, fields)
bases = (basetuple,) + bases
namespace.pop('_fields', None)
namespace.setdefault('__doc__', basetuple.__doc__)
namespace.setdefault('__slots__', ())
return ABCMeta.__new__(mcls, name, bases, namespace)
def __new__(mcls, name, bases, namespace):
fields = namespace.get('_fields')
for base in bases:
if fields is not None:
break
fields = getattr(base, '_fields', None)
if not isinstance(fields, abstractproperty):
basetuple = _namedtuple(name, fields)
bases = (basetuple,) + bases
namespace.pop('_fields', None)
namespace.setdefault('__doc__', basetuple.__doc__)
namespace.setdefault('__slots__', ())
return ABCMeta.__new__(mcls, name, bases, namespace)
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
class D(C):
@property
def foo(self): return super().foo
self.assertEqual(D().foo, 3)
def test_abstractmethod_integration(self):
for abstractthing in [abc.abstractmethod, abc.abstractproperty,
abc.abstractclassmethod,
abc.abstractstaticmethod]:
class C(metaclass=abc.ABCMeta):
@abstractthing
def foo(self): pass # abstract
def bar(self): pass # concrete
self.assertEqual(C.__abstractmethods__, {"foo"})
self.assertRaises(TypeError, C) # because foo is abstract
self.assertTrue(isabstract(C))
class D(C):
def bar(self): pass # concrete override of concrete
self.assertEqual(D.__abstractmethods__, {"foo"})
self.assertRaises(TypeError, D) # because foo is still abstract
self.assertTrue(isabstract(D))
class E(D):
def foo(self): pass
self.assertEqual(E.__abstractmethods__, set())
E() # now foo is concrete, too
self.assertFalse(isabstract(E))
class F(E):
@abstractthing
def bar(self): pass # abstract override of concrete
self.assertEqual(F.__abstractmethods__, {"bar"})
self.assertRaises(TypeError, F) # because bar is abstract now
self.assertTrue(isabstract(F))
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
class D(C):
@property
def foo(self): return super(D, self).foo
self.assertEqual(D().foo, 3)
def test_abstractmethod_integration(self):
for abstractthing in [abc.abstractmethod, abc.abstractproperty]:
class C:
__metaclass__ = abc.ABCMeta
@abstractthing
def foo(self): pass # abstract
def bar(self): pass # concrete
self.assertEqual(C.__abstractmethods__, set(["foo"]))
self.assertRaises(TypeError, C) # because foo is abstract
self.assertTrue(isabstract(C))
class D(C):
def bar(self): pass # concrete override of concrete
self.assertEqual(D.__abstractmethods__, set(["foo"]))
self.assertRaises(TypeError, D) # because foo is still abstract
self.assertTrue(isabstract(D))
class E(D):
def foo(self): pass
self.assertEqual(E.__abstractmethods__, set())
E() # now foo is concrete, too
self.assertFalse(isabstract(E))
class F(E):
@abstractthing
def bar(self): pass # abstract override of concrete
self.assertEqual(F.__abstractmethods__, set(["bar"]))
self.assertRaises(TypeError, F) # because bar is abstract now
self.assertTrue(isabstract(F))
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
class D(C):
@property
def foo(self): return super(D, self).foo
self.assertEqual(D().foo, 3)
