code: def description(filename):
      
      # This ends up in the Summary header for PKG-INFO and it should be a
      # one-liner.  It will get rendered on the package page just below the
      # package version header but above the long_description, which ironically
      # gets stuff into the Description header.  It should not include reST, so
      # pick out the first single line after the double header.
      with open(filename) as fp:
          for lineno, line in enumerate(fp):
              if lineno < 3:
                  continue
              line = line.strip()
              if len(line) > 0:
                  return line
docs: Provide a short description.