本文整理匯總了Python中collections.abc.ABCMeta方法的典型用法代碼示例。如果您正苦於以下問題：Python abc.ABCMeta方法的具體用法？Python abc.ABCMeta怎麽用？Python abc.ABCMeta使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類collections.abc的用法示例。
在下文中一共展示了abc.ABCMeta方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: isabstract
# 需要導入模塊: from collections import abc [as 別名]
# 或者: from collections.abc import ABCMeta [as 別名]
def isabstract(object):
"""Return true if the object is an abstract base class (ABC)."""
if not isinstance(object, type):
return False
if object.__flags__ & TPFLAGS_IS_ABSTRACT:
return True
if not issubclass(type(object), abc.ABCMeta):
return False
if hasattr(object, '__abstractmethods__'):
# It looks like ABCMeta.__new__ has finished running;
# TPFLAGS_IS_ABSTRACT should have been accurate.
return False
# It looks like ABCMeta.__new__ has not finished running yet; we're
# probably in __init_subclass__. We'll look for abstractmethods manually.
for name, value in object.__dict__.items():
if getattr(value, "__isabstractmethod__", False):
return True
for base in object.__bases__:
for name in getattr(base, "__abstractmethods__", ()):
value = getattr(object, name, None)
if getattr(value, "__isabstractmethod__", False):
return True
return False 示例2: abstract_class
# 需要導入模塊: from collections import abc [as 別名]
# 或者: from collections.abc import ABCMeta [as 別名]
def abstract_class(cls_):
"""Decorate a class, overriding __new__.
Preventing a class from being instantiated similar to abc.ABCMeta
but does not require an abstract method.
"""
def __new__(cls, *args, **kwargs):
if cls is cls_:
raise TypeError('{} is an abstract class and may not be instantiated.'
.format(cls.__name__))
return object.__new__(cls)
cls_.__new__ = __new__
return cls_ 示例3: test_abstract
# 需要導入模塊: from collections import abc [as 別名]
# 或者: from collections.abc import ABCMeta [as 別名]
def test_abstract(self):
class Abstract(abc.ABCMeta):
@abc.abstractmethod
def add(self, x, y):
pass
add5 = functools.partialmethod(add, 5)
self.assertTrue(Abstract.add.__isabstractmethod__)
self.assertTrue(Abstract.add5.__isabstractmethod__)
for func in [self.A.static, self.A.cls, self.A.over_partial, self.A.nested, self.A.both]:
self.assertFalse(getattr(func, '__isabstractmethod__', False))