Python - vector dentro de otro vector

def Incluir(U,V):

    m =  len(U)

    n = len(V)

    i = 1

    for j in range (len(V)):

        if (U[0] == V[j]):

            k = j+1

            cont = 0

            while (U[i] == V [k]):

                k = k+1

                i = i+1

            r = i

    if (r == len(U)):

        return (1)

    else:

        return (-1)

U = [1,2,3]

V = [1,2,3]

print(Incluir(U,V))