I don't get what kind of parameters are to be used in the Coderbyte exercise, but I "think" I managed to solve the actual problem anyways. So here's a Scale Balancing function that accepts a list containing two lists. The first list contains the two weights of the scales, while the second list holds the available weights to use. Sample input for…

coderbyte_scalebalancing.py

def ScaleBalancing(strArr): 

    # code goes here
    balance = int(strArr[0][0]) - int(strArr[0][1]) #if negative, right is heavier, else left is heavier
    weights = []
    need = 1
    for i in strArr[1]: #see if one weight can fix the imbalance
        if abs(balance)-int(i)==0:
            weights.append(i)
            return weights
    for i in range(0, len(strArr[1])): #else look for a combination of two different weights that can fix the imbalance
        for j in range(i+1, len(strArr[1])):
            if abs(balance)-int(strArr[1][i])-int(strArr[1][j])==0:
                weights.append(strArr[1][i])
                weights.append(strArr[1][j])
                return weights
    return "not possible" #otherwise declare problem is impossible to solve