title: Sorting rows in csv file using Python Pandas
body: <p>I have a quick question regarding sorting rows in a csv files using Pandas. The csv file which I have has the data that looks like: </p>
  
  <pre><code>quarter week    Value
    5       1      200   
    3       2      100
    2       1       50
    2       2      125
    4       2      175 
    2       3      195 
    3       1      10
    5       2      190
  </code></pre>
  
  <p>I need to sort in following way: sort the quarter and the corresponding weeks. So the output should look like following: </p>
  
  <pre><code>quarter week    Value
    2       1      50  
    2       2      125
    2       3      195
    3       1      10
    3       2      100    
    4       2      175
    5       1      200
    5       2      190
  </code></pre>
  
  <p>My attempt: </p>
  
  <pre><code>df = df.sort('quarter', 'week') 
  </code></pre>
  
  <p>But this does not produce the correct result. Any help/suggestions? </p>
  
  <p>Thanks!</p>