title: Print all POST request parameters without knowing their names
body: <p><strong>How can I print all parameters that were passed in with a POST request using Python and flask?</strong> </p>
  
  <p>I know how to ask for a parameter by name</p>
  
  <pre><code>from flask import  request
  key = request.args.get('key')
  </code></pre>
  
  <p>But i'm not sure why this did not work for me:</p>
  
  <pre><code>for a in request.args:
          print "argument: " + a
  </code></pre>