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49 lines (34 loc) · 815 Bytes
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Copy pathb.py
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49 lines (34 loc) · 815 Bytes
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#!/usr/bin/env python
# encoding: utf-8
class A(object):
def __init__(self, data):
self._data = data
@property
def data(self):
if self._data < 0:
raise ValueError("hi")
else:
return self._data
@data.setter
def data(self, value):
self._data = value
class Descriptor(object):
def __init__(self, value):
self._value = value
def __get__(self, instance, owner):
return self._value ** 2
def __set__(self, instance, value):
print "fuck"
instance._name = value
def __delete__(self, instance):
pass
class B(object):
def __init__(self, name):
self._name = name
a = Descriptor(3)
class DD(object):
X = Descriptor(3)
aa = B(11)
print aa.a
dd = DD()
print dd.X