title: How to read a specific line number in a csv with pandas
body: <p>I have a huge dataset and I am trying to read it line by line.
  For now, I am reading the dataset using pandas:</p>
  
  <pre><code>df = pd.read_csv("mydata.csv", sep =',', nrows = 1)
  </code></pre>
  
  <p>This function allows me to read only the first line, but how can I read the second, the third one and so on?
  (I would like to use pandas.)</p>
  
  <p>EDIT:
  To make it more clear, I need to read one line at a time as the dataset is 20 GB and I cannot keep all the stuff in memory.</p>