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[caizhuo]

I used this example, but it didn't show up.

[tim5go]

@caizhuo
Which version of LTP are you using?
Did you get an error or some unexpected result?

[OnePunchMann]

i use the version 'ltp_data_v3.4.0', it didn't show up.

[tim5go]

@yulongleo
I was using LTP 3.3.1 when I wrote the code, better to stick with that version

[linfeng-du]

@caizhuo Though its long closed... If you're using ltp_data_v3.4.0, you need to substract the arc.head by 1 cuz for arc.head, index 0 is occupied by the ROOT node. This won't cause errors cuz the ROOT node will only be linked once and is used in
root = [i for i, x in enumerate(arcs) if x.relation == 'HED']

E.g.
change
relations = [i for i, x in enumerate(arcs) if x.head == root and x.relation == 'COO']
to
relations = [i for i, x in enumerate(arcs) if x.head - 1 == root and x.relation == 'COO']

I'm getting the demo results and it seems using ltp_data_v3.4.0 could get more.

B.T.W. I render the unclosed issues are related to this as well.