title: python error: TypeError: 'int' object is not iterable
body: <p>I need to count how many lines in the returned value in variable"data",but it doesn't accept the variable as how it is, here is what i did and the error:</p>
  
  <pre><code>sum_lines =0
  data=subprocess.call(["nova list"],shell=True)
  for line in data:
          print line
         sum_lines += 1
  print sum_lines
  </code></pre>
  
  <p>The error </p>
  
  <pre><code>  File "./code.py", line 9, in &lt;module&gt;
      for line in data:
  TypeError: 'int' object is not iterable
  </code></pre>
  
  <p>THE SOLUTION: i had to use check_output </p>
  
  <pre><code>data=subprocess.check_output("nova show "+new+"."+projid_new, shell=True)
  for line in data.splitlines():
          sum_lines +=1
  </code></pre>