def parseNVSS (stream):
linenum = 0
datalinenum = 0
source = None
for line in stream:
linenum += 1
if line[0] == '#':
continue
if datalinenum % 2 == 0:
assert source is None, 'NVSS internal logic error 1'
source = Holder ()
colspec = nvss_columns1
else:
colspec = nvss_columns2
try:
for key, (b0, b1) in colspec.iteritems ():
parser = nvss_parsers.get (key, float)
setattr (source, key, parser (line[b0:b1]))
except Exception as e:
raise Exception ('line %d, item %s: %s' % (linenum, key, e))
if datalinenum % 2 == 1:
# Fixups
source.major_is_ul = source.major[0]
source.major = source.major[1]
source.minor_is_ul = source.minor[0]
source.minor = source.minor[1]
# Done
yield source
source = None
datalinenum += 1
assert source is None, 'NVSS internal logic error 2'
