title: How to delete the last two rows of a df with pandas
body: <p>Here is the code I'm playing with. I want to delete the last two lines of the file. I'm actually working on a bigger file and the last two lines fluctuate. Once I get it to work on this small format, I will implement it in my primary source code. </p>
  
  <pre><code>import pandas as pd
  data = {'name': ['Jason', 'Molly', 'Tina', 'Jake', 'Amy'], 
      'year': [2012, 2012, 2013, 2014, 2014], 
      'reports': [4, 24, 31, 2, 3]}
  df = pd.DataFrame(data, index = ['Cochice', 'Pima', 'Santa Cruz', 
  'Maricopa', 'Yuma'])
  df
  df.drop(dr.index[-2])
  </code></pre>
  
  <p>This will remove the second row from the bottom but I am trying to delete to rows that will be followed by NaN</p>