Iterating through two lists

[Mark McEahern]

[jb]
> I should like to achive this (x is a list of class instances)
>
>   for (a,b) in (x,y): a.f(b)

zip, as others have posted, does the trick.  Here's a solution using
generators:

#! /usr/bin/env python

from __future__ import generators

def walklists(m, n):
    i = 0
    while 1:
        if i >= len(m) or i >= len(n):
            break
        yield (m[i], n[i])
        i += 1

# Setup m and n.

g = walklists(m, n)

for a, b in g:
    print a.f(b)

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