title: numpysavetxt column header
body: <p>I'm using np.savetxt to create a csv file, but I'm not sure if I can add custom headers to each column. For example, I want my csv to look like:
  <a href="https://i.stack.imgur.com/K6SZz.png" rel="nofollow noreferrer">sample excel format</a></p>
  
  <p>For the column headers, preferably I would want it to increment by 1, and possibly index ahead while skipping some ints (I'll have other variables that increment/skip when forming my np array, so I could save the variables in a separate array if that works). </p>
  
  <p>As for the row headers, I'll be reading in various files in my directory, so it'd be most optimal to print the file names there (TypeA, TypeB, etc), otherwise anything that increments works as well. Does savetxt support this, or would something else be more optimal?</p>
  
  <p>If it helps...I'll have at least 100 columns and 200 rows, so manually listing all of them wouldn't work too well.</p>