Command-line hselect utility (rename to hselect and place in $PATH)

hselect.py

#!/usr/bin/env python
#
# Simple command-line IRAF-style hselect. To use:
#
# $ hselect CDELT1 *.fits

import sys
import pyfits

keyword = sys.argv[1]

for filename in sys.argv[2:]:

    header = pyfits.getheader(filename)

    try:
        value = str(header[keyword])
    except KeyError:
        value = '-'

    print "%60s %s" % (filename, value)