returning all matching groups with re.search()

[mhearne808[insert-at-sign-here]gmail[insert-dot-here]com]

Here's a scenario:

import re
m = re.search('e','fredbarneybettywilma')

Now, here's a stupid question:
why doesn't m.groups() return ('e','e','e').

I'm trying to figure out how to match ALL of the instances of a
pattern in one call - the group() and groups() return subgroups... how
do I get my search to get me all of the matching subgroups?