title: How can I get value of the nested dictionary using ImmutableMultiDict on Flask?
body: <pre><code>address_dict = {'address': {'US': 'San Francisco', 'US': 'New York', 'UK': 'London'}}
  </code></pre>
  
  <p>When above parameters was sent via requests, how can I get values in address key using request.form on Flask? </p>
  
  <pre><code>import requests
  url =  'http://example.com'
  params = {"address": {"US": "San Francisco", "UK": "London", "CH": "Shanghai"}}
  requests.post(url, data=params) 
  </code></pre>
  
  <p>Then I got this in context of flask.request.</p>
  
  <pre><code>ImmutableMultiDict([('address', u'US'), ('address', 'US'), ('address', 'UK')])
  </code></pre>
  
  <p>How can I get the value in each key of addresses?</p>
  
  <p>Thanks.</p>