Python Atom API：如何在使用字典时设置atom var

Question

The Atom api is a library used by Enaml to implement MVC. Change an atom var, and the UI is updated. Change it in the UI and your model gets updated.

I would like to put an Atom var (Bool() in this case) into a dictionary and later update that var

 from atom.api import Atom,Bool
 class MyModel(Atom):
     myBool = Bool()

     def getDict(self):
         return {'mybool':self.myBool}

     def setAllBoolsTrue(self):
         self.myBool = True #example to show that just setting mybool will update UI components that use it

         #now to show how I'd like to generalize to many components

         for k,v in self.getDict().iteritems():
             v = True  # this fails, even though the id(v) is the same as id(self.mybool)

The last statement fails to update mybool, it just makes a simple assignment.

So is there a way to update the Bool() retrieved from a dictionary in the same way that simply setting it does?

edit: code updated so no syntax errors.

edit: As per suggestions in the comments, I tried without success:

    tempDict = self.getDict();
    #self.myBool = True  # this works
    tempDict['mybool'] = True  #this does not work

Answer 1

for k, v in getDict(): won't work unless your getDict() function returns a dict of two keys, ie k, v would more aptly be named key1, key2 in this case, where key2 doesn't even exist.

---

If you really want to implement classes, you can do something like...

class MyModel(Atom):

    def __init__(self):
        self.myBool = True


>>> model = MyModel()
>>> model.myBool
True
>>> model.myBool = False
>>> model.myBool
False

Answer 2

After hearing from one of the Atom developers, the answer is to use setattr correctly. I had tried to use setattr on the Bool() itself, but one needs to use it on the Atom subclass, as follows:

 from atom.api import Atom,Bool
 class MyModel(Atom):
     myBool = Bool()

     def getDict(self):
         return {'myBool':self.myBool}

     def setAllBoolsTrue(self):
         self.myBool = True #example to show that just setting mybool will update UI components that use it

         #now to show how to generalize to many components

         for key,value in self.getDict().iteritems():
             setattr(self,key,True) #this updates the UI