本文整理汇总了Python中collections.abc.ABCMeta方法的典型用法代码示例。如果您正苦于以下问题：Python abc.ABCMeta方法的具体用法？Python abc.ABCMeta怎么用？Python abc.ABCMeta使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类collections.abc的用法示例。
在下文中一共展示了abc.ABCMeta方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: isabstract
# 需要导入模块: from collections import abc [as 别名]
# 或者: from collections.abc import ABCMeta [as 别名]
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
# 需要导入模块: from collections import abc [as 别名]
# 或者: from collections.abc import ABCMeta [as 别名]
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
# 需要导入模块: from collections import abc [as 别名]
# 或者: from collections.abc import ABCMeta [as 别名]
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))