making MusicBrainz getters using templates

gistfile1.py

def _make_id_getter(entity):
	def getter(id, **kwargs):
		includes = []
		for name in kwargs:
			if not name.startswith('inc_'):
				raise TypeError('got unexpected keyword argument...')
			elif kwargs[name]:
				includes.append(name[4:])
		return _do_mb_query(entity, id, includes)
	getter.__name__ = 'get_%s_by_id' % entity
	getter.__doc__ = """Fetches a %s given its MBID. Possible keyword
arguments specifying includes:
%s
	""" % (entity, '\n'.join(['inc_' + i for i in VALID_INCLUDES[entity]]))
	return getter

get_artist_by_id = _make_id_getter('artist')
get_label_by_id = _make_id_getter('label')
...