def instrument_from_refname(filename):
"""Based on `filename` rather than it's contents, determine the associated
instrument or raise an exception.
>>> instrument_from_refname('hst_cos_spottab_0052.fits')
'cos'
>>> instrument_from_refname('zas1615jl_spot.fits')
'cos'
>>> instrument_from_refname('foobar.fits')
Traceback (most recent call last):
...
AssertionError: Cannot determine instrument for filename 'foobar.fits'
"""
try: # Hopefully it's a nice new standard filename, easy
return decompose_newstyle_name(filename)[2]
except AssertionError: # cryptic legacy paths & names, i.e. reality
try:
instrument = siname.WhichCDBSInstrument(os.path.basename(filename)).lower()
if instrument == "multi":
instrument = "synphot"
return instrument
except Exception:
assert False, "Cannot determine instrument for filename '{}'".format(filename)
def ref_properties_from_cdbs_path(filename):
"""Based on a HST CDBS `filename`, return
(path, "hst", instrument, filekind, serial, ext)
Raise AssertionError if it's not a good filename.
"""
path, fields, extension = _get_fields(filename)
# For legacy files, just use the root filename as the unique id
serial = os.path.basename(os.path.splitext(filename)[0])
# First try to figure everything out by decoding filename. fast
instrument = siname.WhichCDBSInstrument(os.path.basename(filename)).lower()
if instrument == "synphot":
if filename.endswith("_syn.fits"):
filekind = "thruput"
elif filename.endswith("_th.fits"):
filekind = "thermal"
elif filename.endswith("_tmt.fits"):
filekind = "tmttab"
elif filename.endswith("_tmg.fits"):
filekind = "tmgtab"
elif filename.endswith("_tmc.fits"):
filekind = "tmctab"
else:
assert False, "Uknown synphot filetype for: " + repr(filename)
suffix = filename.split("_")[-1][:-len(".fits")]
elif extension == ".fits":
suffix = fields[1]
else:
suffix = GEIS_EXT_TO_SUFFIX[extension[1:3]]
try:
filekind = TYPES.suffix_to_filekind(instrument, suffix)
except KeyError:
assert False, "Couldn't map extension/suffix " + repr(suffix) + " to filekind."
return path, "hst", instrument, filekind, serial, extension