对于在父类中存在的属性,如果要在其派生类中继续扩展属性
可以这样实现
1 class Valley:
2 def __init__(self):
3 self._name = None
4
5 @property
6 def name(self):
7 return self._name
8
9 @name.setter
10 def name(self, val):
11 try:
12 assert val.startswith("g")
13 except AssertionError:
14 self._name = "g" + val
15 else:
16 self._name = val
17
18
19 class SubValley(Valley):
20 @Valley.name.setter
21 def name(self, val):
22 if len(val) >= 3:
23 print(">>长度检查通过")
24 else:
25 raise Exception("{}长度应大于等于3".format(val))
26 super(SubValley, SubValley).name.__set__(self, val)
27
28
29 if __name__ == '__main__':
30 obj = SubValley()
31 obj.name = 'lee'
32 print(obj._name)
output:
长度检查通过
gleeOriginal: https://www.cnblogs.com/shixiaogu/p/16790046.html
Author: 默玖
Title: 派生类中扩展属性
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