def remove_edge(G,edge):
    v = vertices(G)
    G[v[edge[0]]].remove(v[edge[1]])
    G[v[edge[1]]].remove(v[edge[0]])

def add_edge(G,edge):
    v = vertices(G)
    G[v[edge[0]]].append(v[edge[1]])
    G[v[edge[1]]].append(v[edge[0]])

def get_bridges(G):
    V =vertices(G)
    bridges = []
    my_edges = edges(G)
    for edge in my_edges:
        print(edge)
        remove_edge(G,edge) #ERROR HERE <-------------------------------------------

        BFS(G,edge[0])
        if G[V [edge[1]]].distance == INFINITY:
            bridges.append(edge)
        clear(G)

        add_edge(edge)


    return bridges

def no_cycles(G):
    V = vertices(G)
    no_cycles = True
    for s in V: #begin elke keer bij andere node
        clear(G)
        s.visited = True
        s.predecessor = None
        for v in V: # iedereen attribuut 'visited'
            if v != s:
                v.visited = False
                v.predecessor = None
        q = myqueue()
        q.enqueue(s)
        while q:
            u = q.dequeue()
            for v in G[u]:
                #print (u, ':', v, end=', ')
                if v != u.predecessor: # v is niet waar die van daar komt
                    if not v.visited:
                        v.visited = True
                        v.predecessor = u
                        q.enqueue(v)
                    else:
                        #print("FALSE", end= ' ')
                        no_cycles = False

    return no_cycles

if __name__ == '__main__':
    v4 = [Vertex(i) for i in range(8)]

    G4 = {v4[0]:[v4[1],v4[3]],
         v4[1]:[v4[0],v4[2]],
         v4[2]:[v4[1],v4[3],v4[4]],
         v4[3]:[v4[0],v4[2]],
         v4[4]:[v4[2],v4[5],v4[6]],
         v4[5]:[v4[4],v4[6]],
         v4[6]:[v4[4],v4[5],v4[7]],
         v4[7]:[v4[6]]}


    print(edges(G4))
    remove_edge(G4,(7,6))
    print(edges(G4))
    add_edge(G4,(7,6))
    print(edges(G4))
    print(get_bridges(G4))


ERROR MSG :
Ik snap niet hoe, ik roep ze precies op de zelfde manier aan.


Traceback (most recent call last):
  File "C:\DATA\Study Jaar 2\Algoritmen & Datastructuren\Practicum\Week 5\Opdracht 5.3.py", line 183, in <module>
    print(get_bridges(G4))
  File "C:\DATA\Study Jaar 2\Algoritmen & Datastructuren\Practicum\Week 5\Opdracht 5.3.py", line 124, in get_bridges
    remove_edge(G,(edge))
  File "C:\DATA\Study Jaar 2\Algoritmen & Datastructuren\Practicum\Week 5\Opdracht 5.3.py", line 110, in remove_edge
    G[v[edge[0]]].remove(v[edge[1]])
TypeError: list indices must be integers or slices, not Vertex