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"""
Implementation of command for removing ASDF HDU from ASDF-in-FITS file.
"""
from astropy.io import fits
from .main import Command
__all__ = ["remove_hdu"]
class FitsExtractor(Command): # pragma: no cover
"""This class is the plugin implementation for the asdftool runner."""
@classmethod
def setup_arguments(cls, subparsers):
parser = subparsers.add_parser(
"remove-hdu",
help="Remove ASDF extension from ASDF-in-FITS file",
description="Removes ASDF extensions from ASDF-in-FITS files.",
)
parser.add_argument(
"infile", action="store", type=str, help="Name of ASDF-in-FITS file containing extension to be removed"
)
parser.add_argument("outfile", action="store", type=str, help="Name of new FITS output file")
parser.set_defaults(func=cls.run)
return parser
@classmethod
def run(cls, args):
return remove_hdu(args.infile, args.outfile)
def remove_hdu(input_file, output_file):
"""Function for removing ASDF HDU from ASDF-in-FITS files"""
try:
with fits.open(input_file) as hdulist:
hdulist.readall()
asdf_hdu = hdulist["ASDF"]
hdulist.remove(asdf_hdu)
hdulist.writeto(output_file)
except (ValueError, KeyError) as error:
raise RuntimeError(str(error))
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