Say I have a model like
class MyModel(models.Model)
   name = models.CharField(max_length=100)
   number = models.IntegerField()

In a script, I want to have something like
fields = {"name":"Joe", "number":5}

And I want to update a MyModel instance using the fields dictionary, 
something like this
inst = MyModel.objects.get(pk=2)
for k,v in fields.iteritems():
   inst.k = v   # I tried with inst.F(k) = v and inst.eval(k) = v but 
python doesn't like that either

I hope I'm being clear in what I'm trying to do.  The reason I have to do 
it this way is that I don't know which model, and therefore fields, I'm 
dealing with until run-time.
Please ask questions if this isn't clear.

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