s02220725 ParDescr 8412			Городецкая Агнесса Алексеевна 418 ParDescr 7902
t	1	class ParDescr:	t	1	class ParDescr:
	2			2
	3	def __init__(self, initial_value):		3	def __init__(self, initial_value):
	4	self.initial_value = initial_value		4	self.initial_value = initial_value
	5	self.name = None		5	self.name = None
	6			6
	7	def __set_name__(self, owner, name):		7	def __set_name__(self, owner, name):
	8	self.name = name		8	self.name = name
	9			9
	10	def __get__(self, instance, owner):		10	def __get__(self, instance, owner):
	11	if instance is None:		11	if instance is None:
	12	return self.initial_value		12	return self.initial_value
	13	return instance.__dict__.get(self.name, self.initial_value)		13	return instance.__dict__.get(self.name, self.initial_value)
	14			14
	15	def __set__(self, instance, value):		15	def __set__(self, instance, value):
	16	instance.__dict__[self.name] = value		16	instance.__dict__[self.name] = value
	17			17
	18	def __delete__(self, instance):		18	def __delete__(self, instance):
	19	if self.name in instance.__dict__:		19	if self.name in instance.__dict__:
	20	del instance.__dict__[self.name]		20	del instance.__dict__[self.name]
	21	else:		21	else:
	22	raise KeyError(self.name)		22	raise KeyError(self.name)

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