having trouble with a mathmatical function

[lukerobi]

lets say i have 2 lists:
lista = [1,2,3,5,6,7]
listb = [4,5,6,7,8,9,10]

The lists can be different lengths, and may not allways be unequal lengths.

The higher average will allways be in listb, so that is the 1 constant we can rely on.

This works for even teams:

average = float(sum(lista) + sum(listb)) / \
        float(len(lista) + len(listb))

    value = round(abs((average * len(lista)) - sum(lista)))

value would return the number i needed to move from listb to lista

i tried this,but it doesnt seem to work:

Offset = float(len(listb) - len(lista))    

    value = round(((len(lista) * sum(lista)) + \
    (len(lista) * Offset) - \
    (average * len(lista) - \
    (average * Offset))) / \
    (len(lista) * Offset))

any ideas?

[scru]

Huh? You've said what you've done, but not what you're trying to do...

[JohnboyUK]

Is the function a fictitious theory or for a specific reason?

[vegaseat]

You are getting tangled up in a forest of parenthesis. There is one missing in the mess. It is best to break things into smaller parts ...

list_a = [1,2,3,5,6,7]
list_b = [4,5,6,7,8,9,10]
# for convenience 
list_ab = list_a + list_b

average = float(sum(list_ab))/len(list_ab)
offset = float(len(list_b) - len(list_a))

a = len(list_a) * sum(list_a)
b = len(list_a) * offset
c = average * len(list_a)
d = average * offset

value = (a + b - c - d)/b

print value
print round(value)