问题描述
我通常有这样的课程设计:
class MyClass():
def __init__(self,arg1):
self.arg1 = arg1
@property
def arg1(self):
return _arg1
@arg1.setter
def arg1(self,value):
self._arg1 = value
def set_my_dict(self):
argdict = {'arg1':4}
for k,v in argdict:
setattr(self,k,v)
在这种情况下,此setattr
调用是否进行了可能进行类型检查的设置程序等?
解决方法
我也很感兴趣,所以我打开了ipython并将pdb添加到setter方法中进行测试。
In [5]: class MyClass():
...: def __init__(self,arg1):
...: self.arg1 = arg1
...:
...: @property
...: def arg1(self):
...: return _arg1
...:
...: @arg1.setter
...: def arg1(self,value):
...: import pdb;
...: pdb.set_trace();
...: self._arg1 = value
...:
In [6]: xr = MyClass(2)
> <ipython-input-5-21bab018f5a2>(13)arg1()
-> self._arg1 = value
(Pdb) c
In [7]: setattr(xr,"arg1",3)
> <ipython-input-5-21bab018f5a2>(13)arg1()
-> self._arg1 = value
(Pdb) c
在实例化和使用setattr时都使用setter函数。整洁。