Splitting a list of addresses

Dear Email Group,

Given a string containing a list of addresses separated by a comma,
such as one might find in a 'CC' field,  email.utils.parseaddr
correctly parses the first address and then silently ignores all of
the following ones.  Could a version of that function be put into the
library that returned a tuple of tuples, rather than just dropping the
additional information?

Best wishes,

N.