I had similar issue with gpt4, was looking for a library that given a grammar and a string, would produce a list of next valid symbols.
Gpt4 only ever suggested grammar validator to the point I had given up and was going to write a grammar generator, and so I started looking for the equivalent of antlr in python, and in three searches I find out nltk.grammar that actually solves the original problem
It's not a new library either, so I'm dumbfounded by why gpt4 couldn't make sense of my request.
