docs: def _main():
      """\
      Usage: tabulate [options] [FILE ...]
  
      Pretty-print tabular data.
      See also https://bitbucket.org/astanin/python-tabulate
  
      FILE                      a filename of the file with tabular data;
                                if "-" or missing, read data from stdin.
  
      Options:
  
      -h, --help                show this message
      -1, --header              use the first row of data as a table header
      -o FILE, --output FILE    print table to FILE (default: stdout)
      -s REGEXP, --sep REGEXP   use a custom column separator (default: whitespace)
      -F FPFMT, --float FPFMT   floating point number format (default: g)
      -f FMT, --format FMT      set output table format; supported formats:
                                plain, simple, grid, fancy_grid, pipe, orgtbl,
                                rst, mediawiki, html, latex, latex_booktabs, tsv
                                (default: simple)
      """
      import getopt
      import sys
      import textwrap
      usage = textwrap.dedent(_main.__doc__)
      try:
          opts, args = getopt.getopt(sys.argv[1:],
                       "h1o:s:F:f:",
                       ["help", "header", "output", "sep=", "float=", "format="])
      except getopt.GetoptError as e:
          print(e)
          print(usage)
          sys.exit(2)
      headers = []
      floatfmt = "g"
      tablefmt = "simple"
      sep = r"\s+"
      outfile = "-"
      for opt, value in opts:
          if opt in ["-1", "--header"]:
              headers = "firstrow"
          elif opt in ["-o", "--output"]:
              outfile = value
          elif opt in ["-F", "--float"]:
              floatfmt = value
          elif opt in ["-f", "--format"]:
              if value not in tabulate_formats:
                  print("%s is not a supported table format" % value)
                  print(usage)
                  sys.exit(3)
              tablefmt = value
          elif opt in ["-s", "--sep"]:
              sep = value
          elif opt in ["-h", "--help"]:
              print(usage)
              sys.exit(0)
      files = [sys.stdin] if not args else args
      with (sys.stdout if outfile == "-" else open(outfile, "w")) as out:
          for f in files:
              if f == "-":
                  f = sys.stdin
              if _is_file(f):
                  _pprint_file(f, headers=headers, tablefmt=tablefmt,
                               sep=sep, floatfmt=floatfmt, file=out)
              else:
                  with open(f) as fobj:
                      _pprint_file(fobj, headers=headers, tablefmt=tablefmt,
                                   sep=sep, floatfmt=floatfmt, file=out)