def _load_coldefs(cls, fileobj):
"""
Read the table column definitions from the ASCII file output by
BinTableHDU.dump().
"""
close_file = False
if isinstance(fileobj, basestring):
fileobj = open(fileobj, 'r')
close_file = True
columns = []
for line in fileobj:
words = line[:-1].split()
kwargs = {}
for key in ['name', 'format', 'disp', 'unit', 'dim']:
kwargs[key] = words.pop(0).replace('""', '')
for key in ['null', 'bscale', 'bzero']:
word = words.pop(0).replace('""', '')
if word:
word = _str_to_num(word)
kwargs[key] = word
columns.append(Column(**kwargs))
if close_file:
fileobj.close()
return ColDefs(columns)
