title: pandas: split dataframe into multiple csvs
body: <p>I have a large file, imported into a single dataframe in Pandas.
  I'm using pandas to split up a file into many segments, by the number of rows in the dataframe.</p>
  
  <p>eg:  10 rows:
  file 1 gets [0:4]
  file 2 gets [5:9]</p>
  
  <p>Is there a way to do this without having to create more dataframes?</p>