bad recursion, still works

[mdsherry at gmail.com]

On Jul 17, 8:27 am, Jeff <jeffo... at gmail.com> wrote:
> Thanks, that made things very clear.  I like that technique for adding
> memoization via the parameter.  That is clever.  It would be nice if
> there were a way to have multiple functions close over a shared local
> variable in Python, like let-binding in lisp.

Is this something like what you're looking for?

>>> def functionmaker():
...     shared = []
...     def addnumber():
...             shared.append(3)
...             return shared
...     def addletter():
...             shared.append('f')
...             return shared
...     return addnumber, addletter
...
>>> addnumber, addletter = functionmaker()
>>> addnumber()
[3]
>>> addletter()
[3, 'f']