get return or locals from "exec" str in "environment"

[lucas]

ok, i am stuck.  i tried some test code attempts and i am stuck.  so here is some sample code:

xx2 = """
def lucas53():
  harry = (4+16)/2
  rtn = dict(harry=harry)
  return rtn
"""

and then i run:

env = {}
exec xx2 in env
lst = env

and lst returns a huge dictionary of many types, some excerpts are:
{...
...'globals': <built-in function globals>, ...
...'vars': <built-in function vars>, ...
...'locals': <built-in function locals>, ...
...'lucas53': <function lucas53 at 0x214348c>}

and i can see my executed function in there as a type function, and local and global vars, but i can not access or find "harry" or "rtn" the variables within the function lucas53.  i do not know how to access the local variables within lucas53 or the locals to find harry or rtn.  i really just want the return dictionary.  make sense?

anyway, python impresses me with its graceful and concise code, but i really have not found the solution to this mess.

please advise and thank you in advance.  lucas