ExameNormal20152016_ex4

def exame1516_4():
    x1 = {3:5, 6:2, 'len':7}
    x2 = {1:2,3:4,5:3,'len':7}
    x3 = {}

    for c,v in x1.items():
        if c in x2.keys() and c is not 'len':
            value = x1.get(c) + x2.get(c)
            if c not in x3:
                x3[c] = value
        else:
            x3[c] = x1[c]

    for c,v in x2.items():
        if c in x1.keys() and c is not 'len':
            value = x1.get(c) + x2.get(c)
            if c not in x3:
                x3[c] = value
        else:
            x3[c] = x2.get(c)

    for i in range(x1.get('len')):
        if i not in x3.keys():
            x3[i] = 0

    print(x3)