Feature Request: Getting the previous Neighbour

[julianpollmann]

The Token class has a nbor(i) method for retrieving one or more next token(s).
This method only allows to get next neighbours, therefore a feature request for a method to get the previous neighbours.

Token.lefts/rights do not cover this scenario.

[honnibal]

token.nbor(-1) should do what you're looking for.

[julianpollmann]

This raised an IndexError Exception, but should be expected. I had to check the Index against the parent, i.e. doc:

for token in doc:
    if token.i > 1:
        prev = token.nbor(-1)
        
    if token.i < len(doc) -1 :
        next = token.nbor()