Hey guys, I often use dictionary in my functions to store and return 
created elements, however, it is really a pain to deal with if something in 
the dictionary doesn't exist. So I would like to have a function that goes 
through all of the elements in a dictionary, and if it finds object's that 
doesn't exists it should remove the values from the dictionary, and if it 
finds empty keys, it should delete them also.
 
Here's what I got so far:
#This is my dictionary
myDict['objects']:  [('pSphere1'),
                     ('pSphere2'),
                    [('pCube1'), ('pCube2'), ('pCube3')],
                    [[('loc1'), ('loc2')], [('obj1'), ('obj2')]],
myDict['nodes']:    [('pointConstraint1'),
                     ('pointConstraint2'),
                     ('pointConstraint3'),
                     
#I want to go through each item in the dictionary
for key, val in myDict.iteritems():
    #If the current value is a list
    if isinstance(val, list) == True:
        #For each item in the list
        for valLoop1 in val:
            #If the current value is a list
            if isinstance(valLoop1, list) == True:
                #For each item in the list
                for valLoop2 in valLoop1:
                  #If the current value is a list
                  if isinstance(valLoop2, list) == True:
                    #And this goes on and on
                  #If the current item is not a list
                  else:
                    #If the object doesn't exist
                    if not cmds.objExists(val):
                      #Pop the value out from the dictionary
                      #Don't know how to do this yet
            #If the current item is not a list
            else:
              #If the object doesn't exist
              if not cmds.objExists(val):
                #Pop the value out from the dictionary
                #Don't know how to do this yet
    #If the current item is not a list
    else:
      #If the object doesn't exist
      if not cmds.objExists(val):
        #Pop the value out from the dictionary
        #Don't know how to do this yet

http://pastebin.com/2Q6dzLut
 
This is pretty ugly, how many lists it supports is dependant on how many 
isinstances I write.. Also if I find an object that doesn't exist, I don't 
know how to pop that specific value from the dictionary, and also if it 
finds empty keys..
 
 
Does anyone have any tips or hints on this?

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