Problem with Dydigraph time_slice() + interactions()

[tommantonela]

Hi,
I was running the code for the example of the time_slice method, and the output does not match the one in the documentation.
Given:

G = dn.DynDiGraph()
G.add_interaction(0,1, t=0)
G.add_interaction(1,2, t=0)
G.add_interaction(2,3, t=0)
G.add_interaction(0,4, t=1)
G.add_interaction(4,5, t=1)
G.add_interaction(5,6, t=1)
G.add_interaction(7,1, t=2)
G.add_interaction(1,2, t=2)
G.add_interaction(2,3, t=2)
H = G.time_slice(0)
H.interactions()

The output should be: [(0, 1), (1, 2), (1, 3)], but instead, it is [(0, 1, {'t': [[0, -1]]})]. Notice also the -1 in the t. Nonetheless, for [e for e in G1.time_slice(0).edges()] the output is correct (except for the t, which continue to show -1).

Could it be related to how seen is populated in interactions_iter?