title: How to pass extra arguments to callback register functions with twisted python api?
body: <p>I have the following python code using the twisted API. </p>
  
  <pre><code>def function(self,filename):    
      def results(result):
         //do something
      for i in range(int(numbers)) :
          name = something that has to do with the value of i         
          df = function_which_returns_a defer(name)
          df.addCallback(results)
  </code></pre>
  
  <p>It uses the Twisted API. What i want to achieve is to pass to the callbacked function (results) the value of the name which is constructed in every iteration without changing the content of the functions_which_returns_a defer() function along with the deferred object of course. In every result of the functions_which_returns_a deffer the value of the name should be passed to results() to do something with this. I.e: at the first iteration when the execution reach the results function i need the function hold the result of the deffered object along with the value of name when i=0,then when i=1 the defered object will be passed with the value of name, and so on.So i need every time the result of the defer object when called with the name variable alond with the name variable. When i try to directly use the value of nameinside results() it holds always the value of the last iteration which is rationale, since function_which_returns_a defer(name) has not returned.</p>