def dot(vector01,vector02):
    result= []
    if len(vector01) != len(vector02):
        raise ValueError
        for i in range(len(vector01)):
            total = 0
            total += vector01[i] * vector02[i]
            result.append(total)
       return result

vector01 = [2, 3, 4]
vector02 = [4, 2, 1]
print(dot(vector01,vector02))