Bug in conll.py

[amralaa-MSFT]

On line 211, conll.py script makes a call to DependencyTree.add_node passing 2 positional arguments. However, the documentation specifies that it accepts only 1 argument. I couldn't get this script to work using networkx v2.3 nor v2.5

# conll.py
           T.add_edge(new_index_dict[h],new_index_dict[d],deprel=self[h][d]["deprel"])

[ins] In [3]: T.add_node?
Signature: T.add_node(node_for_adding, **attr)
Docstring:
Add a single node `node_for_adding` and update node attributes.

Parameters
----------
node_for_adding : node
    A node can be any hashable Python object except None.
attr : keyword arguments, optional
    Set or change node attributes using key=value.

[melvinjosej]

@JunjieHu could you please take a look at this issue?