Combinação Linear de Vetores

def Vector_CL(a1,v1,a2,v2):
    if (   len(v1)!=len(v2)   ):
        print "Vectors_CL: Vectors does not have same length";
        exit();
        
    a1*=1.0
    a2*=1.0
    
    u=[]
    for i in range( len(v) ):
        u.append( a1*v1[i]+a2*v2[i] )

    return u