return_array=False

[DayanaYuan]

There is a error: AssertionError: For return_array=False, there should be one and only one edge between u and v, but get 0 edges. Please use return_array=True instead

[YuyingShang]

i met the same question, have you solved the problem yet?

[shoron-dutta]

I found something working for me and posted the details here: https://github.com/kkteru/grail/issues/14#issuecomment-2427857986