tiktoken library issue #762
Description
Bug description
in attached file tiktoken = tiktoken.get_encoding("gpt-2") is written, currently while trying to run that particular cell, error of allowed_special variable not defined is arising, it's working and running properly when get_encoding("cl100k_base") is used instead of above written in picture.
What operating system are you using?
Linux
Where do you run your code?
Google Colab
Environment