#! /usr/bin/env python

import argparse
import os.path as op
from pyuvdata import UVData

parser = argparse.ArgumentParser()
parser.add_argument('uvfits_read',
                    help='name of a uvfits file to read in')
parser.add_argument('uvfits_write',
                    help='name of a uvfits file to write out')

args = parser.parse_args()

uvfits_file_in = args.uvfits_read
if not op.isfile(uvfits_file_in):
    raise IOError('There is no file named {}'.format(args.uvfits_file_in))

uvfits_file_out = args.uvfits_write

this_uv = UVData()
this_uv.read_uvfits(uvfits_file_in)

this_uv.write_uvfits(uvfits_file_out)

del(this_uv)