networkx.utils.misc.groups¶

groups
(many_to_one)[source]¶ Converts a manytoone mapping into a onetomany mapping.
many_to_one
must be a dictionary whose keys and values are all hashable.The return value is a dictionary mapping values from
many_to_one
to sets of keys frommany_to_one
that have that value.For example:
>>> from networkx.utils import groups >>> many_to_one = {"a": 1, "b": 1, "c": 2, "d": 3, "e": 3} >>> groups(many_to_one) {1: {'a', 'b'}, 2: {'c'}, 3: {'d', 'e'}}