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本帖最后由 clyang12s@imr.a 于 2018-5-10 22:14 编辑
求帮忙逐行解读如下代码。
题目要求中生成了3个文件,其中test.py文件是如何生成的呢?
import os
import pickle
class MyDes:
saved = []
def __init__(self, name = None):
self.name = name
self.filename = self.name + '.pkl'
def __get__(self, instance, owner):
if self.name not in MyDes.saved:
raise AttributeError("%s 属性还没有赋值!" % self.name)
with open(self.filename, 'rb') as f:
value = pickle.load(f)
return value
def __set__(self, instance, value):
with open(self.filename, 'wb') as f:
pickle.dump(value, f)
MyDes.saved.append(self.name)
def __delete__(self, instance):
os.remove(self.filename)
MyDes.saved.remove(self.name)
>>> class Test:
x = MyDes('x')
y = MyDes('y')
>>> test = Test()
>>> test.x = 123
>>> test.y = "I love FishC.com!"
>>> test.x
123
>>> test.y
'I love FishC.com!'
hi
test.py 是老师的代码文件名,实际上生成的文件就2个pkl
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