from collections import nametuple

"""
Example:
>>> tag1 = TagTuple(character='tag1')
>>> tag2 = TagTuple(general='tag2')
>>> tag3 = TagTuple(character='tag3')
>>> tag1 < tag3 # Compare with same tag type
True
>>> tag3 < tag2 # Compare with different tag type
True
"""

# Tags sorted lexicographically, general > meta > character
TagTuple = namedtuple('TagTuple', ['general','meta','character'])
# Default to empty string for all (unset) tag types
# This is to ensure sortability ('' < s for any s != '')
TagTuple.__new__.__defaults__ = ('','','')