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from astropy.io import fits as pyfits
from stsci.tools import irafglob, fileutil, parseinput
def parseSingleInput(f=None, ext=None):
if isinstance(f, str):
# create an HSTWCS object from a filename
if ext != None:
filename = f
if isinstance(ext,tuple):
if ext[0] == '':
extnum = ext[1] # handle ext=('',1)
else:
extnum = ext
else:
extnum = int(ext)
elif ext == None:
filename, ext = fileutil.parseFilename(f)
ext = fileutil.parseExtn(ext)
if ext[0] == '':
extnum = int(ext[1]) #handle ext=('',extnum)
else:
extnum = ext
phdu = pyfits.open(filename)
hdr0 = phdu[0].header
try:
ehdr = phdu[extnum].header
except (IndexError, KeyError), e:
raise e.__class__('Unable to get extension %s.' % extnum)
elif isinstance(f, pyfits.HDUList):
phdu = f
if ext == None:
extnum = 0
else:
extnum = ext
ehdr = f[extnum].header
hdr0 = f[0].header
filename = hdr0.get('FILENAME', "")
else:
raise ValueError('Input must be a file name string or a pyfits file '
'object')
return filename, hdr0, ehdr, phdu
def parseMultipleInput(input):
if isinstance(input, str):
if input[0] == '@':
# input is an @ file
filelist = irafglob.irafglob(input)
else:
try:
filelist, output = parseinput.parseinput(input)
except IOError: raise
elif isinstance(input, list):
if isinstance(input[0], wcsutil.HSTWCS):
# a list of HSTWCS objects
return input
else:
filelist = input[:]
return filelist
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