new_contents: #! /usr/bin/env python
  
  import argparse
  import os.path as op
  from uvdata.uv import UVData
  
  parser = argparse.ArgumentParser()
  parser.add_argument('uvfits1',
                      help='name of first uvfits file.')
  parser.add_argument('uvfits2',
                      help='name of second uvfits file to compare to first.')
  
  args = parser.parse_args()
  
  uvfits_file1 = args.uvfits1
  if not op.isfile(uvfits_file1):
      raise IOError('There is no file named {}'.format(args.uvfits_file1))
  
  uvfits_file2 = args.uvfits2
  if not op.isfile(uvfits_file2):
      raise IOError('There is no file named {}'.format(args.uvfits_file2))
  
  uv1 = UVData()
  uv1.read_uvfits(uvfits_file1)
  
  uv2 = UVData()
  uv2.read_uvfits(uvfits_file2)
  
  if uv1 == uv2:
      print('uvdata objects from files are equal')
  else:
      print('uvdata objects from files are not equal')
  
  del(this_uv)
  
subject: Add little script to test 2 uvfits files for equality