Question

考虑我有以下字典：

dic={}
dic["var1"]=val1
dic["var2"]=val2

现在我有另一个包含两个属性的对象：var1和var2。我想在对象的方法中运行一个循环，如（伪代码）：

for key, value in dic
  self.key=value

以便self.var1=val2和self.var2=val2

如何在python中实现它？

梅尔

Answer 1

>>> class Obj(object):
...     pass
... 
>>> obj = Obj()
>>> for key, value in {'var1':5, 'var2':6}.iteritems():
...     setattr(obj, key, value)
... 
>>> obj.var1
5
>>> obj.var2
6

在这里，我有义务说“为什么不使用字典？”

Answer 2

您可以使用“setattr”：

class Test:
  var1 = "Cheese"
  var2 = "Toast"


dic = {}
dic["var1"] = "NewCheese"
dic["var2"] = "NewToast"

oTest = Test()

for key in dic.keys():
  setattr(oTest, key, dic[key])

print "Var1 = ", oTest.var1
print "Var2 = ", oTest.var2

# 
# Result
#
# Var1 =  NewCheese
# Var2 =  NewToast
#

请参阅http://docs.python.org/library/functions.html#setattr。

Answer 3

您可以更新内部__dict__属性，该属性是包含对象所有成员的字典。

class MyObj:
    def __init__(self, member_dict):
        self.__dict__.update(member_dict)

dic={}
dic["var1"]=val1
dic["var2"]=val2

obj = MyObj(dic)

print obj.var1
>>> val1
print obj.var2
>>> val2

循环遍历字典以向对象插入值

3 个答案: