本文整理匯總了Python中weakref.ref.__new__方法的典型用法代碼示例。如果您正苦於以下問題：Python ref.__new__方法的具體用法？Python ref.__new__怎麽用？Python ref.__new__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weakref.ref的用法示例。
在下文中一共展示了ref.__new__方法的1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: __new__
# 需要導入模塊: from weakref import ref [as 別名]
# 或者: from weakref.ref import __new__ [as 別名]
def __new__(cls, meth, callback=None):
try:
obj = meth.__self__
func = meth.__func__
except AttributeError:
raise TypeError("argument should be a bound method, not {}"
.format(type(meth)))
def _cb(arg):
# The self-weakref trick is needed to avoid creating a reference
# cycle.
self = self_wr()
if self._alive:
self._alive = False
if callback is not None:
callback(self)
self = ref.__new__(cls, obj, _cb)
self._func_ref = ref(func, _cb)
self._meth_type = type(meth)
self._alive = True
self_wr = ref(self)
return self