dict_method.py

import collections
class DummyDict(collections.UserDict):
  def __getattr__(self, attr):
        return self['temp'+attr]
    def __setattr__(self, attr, value):
        self['temp"+attr] = value
  
d = DummyDict()      
for my_data in dates:
  setattr(d, my_data, len(my_data)
  
d.mydata

gistfile1.py

dates = ['01152015','02192015','03152014','05302015','06052015','07212015','08152015']
 
d = type('Dummy', (),{})()

for my_data in dates:
    setattr(d, 'temp'+my_data, len(my_data))
   
print dir(d)