I have been trying to count the number of loops using `count_multiple`

function for a particular vertex. But, I seem to get an error. The adjacency matrix is correct, so` n_loop`

for the edges `(0,0)`

should be 3. But, I get the answer to be 1. See the code below. Not sure what is going on.

Would appreciate comments. Thx, Sid

```
g = Graph([(0,1)],directed=True)
g.add_edges([(0,0)])
g.add_edges([(0,0)])
g.add_edges([(0,0)])
n_loop=g.count_multiple((0,0))
print(g.get_adjacency())
print("n_loop =", n_loop)
```

Output:

```
[[3, 1]
[0, 0]]
n_loop = 1
```