interactive editing

[max(01)*]

hi.

i would like to save, list and modify objects definitions in the python 
shell... smt like:

 >>> def aFun():
...   return "I am aFun() !"
...
 >>> <command to save the previous source code to a file>
 >>> <command to view the previous definition>
def aFun():
   return "I am aFun() !"
 >>> <command to edit it>
<an emacs/vi/whatever process spawned, or better an internal editor if 
it exists>
 >>>

is it possible?

bye

max