title: imported variable update is not reflecting in the parent module
body: <p>i have two modules, main and update.</p>
  <p>in main, i declare a dictionary of references and a list for each value. In update i update the age, but i do not see the update reflecting in the main module again.</p>
  <pre><code>main module
  
  candidates = {'goutham': {'Age': 30}, 'teja':{'Age': 27}}
  
  for s in candidates:
      portfolio[s] = [0,0] # some value which i use for other calculations
  
  update module
  from main import *
  
  portfolio['goutham'][0] = 32
  </code></pre>
  <p>Now when i come back to main and print the portfolio['goutham']. It still shows the values as [0,0]</p>