title: Not being able to add column(Python)
body: <p>So I've run a certain calculation in a loop, and obtained the results which are stored in a list-store1:</p>
  
  <pre><code>for st in store1[:10]:
      print (st)
  0
  4
  1
  0
  0
  1
  2
  3
  1
  1
  </code></pre>
  
  <p>I have a dataframe <strong>dd</strong>, and I would like to add the values of store1 to it as a separate column. I've run the following code:</p>
  
  <pre><code>for st in store1[:40000]:
      dd['Parts_needed']=st
  </code></pre>
  
  <p>But instead of the actual values, what I get is:</p>
  
  <pre><code>dd.Parts_needed.head(10)
  Out[40]: 
  0    2
  1    2
  2    2
  3    2
  4    2
  5    2
  6    2
  7    2
  8    2
  9    2
  </code></pre>
  
  <p>Can somebody help me out here? Thanks a lot.</p>