Novice Question: two lists -> dictionary

[Alex]

You could do something like 

**************************************************
ListA = ['10', '10', '20', '20', '20', '24']
ListB = ['23', '44', '11', '19', '57', '3']

Dict = {}
for (key, value) in map (None, ListA, ListB):
    Dict [key] = Dict.get (key, [])
    Dict [key].append (value)

print Dict
**************************************************

The result is 

{'24': ['3'], '10': ['23', '44'], '20': ['11', '19', '57']}

See you.
Alex.