import tiktoken
enc = tiktoken.get_encoding("gpt2")
assert enc.decode(enc.encode("hello world")) == "hello world"

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
Input In [47], in <cell line: 2>()
      1 import tiktoken
----> 2 enc = tiktoken.get_encoding("gpt2")
      3 assert enc.decode(enc.encode("hello world")) == "hello world"

File ~/work/p3ds/lib/python3.10/site-packages/tiktoken/registry.py:60, in get_encoding(encoding_name)
     57     assert ENCODING_CONSTRUCTORS is not None
     59 if encoding_name not in ENCODING_CONSTRUCTORS:
---> 60     raise ValueError(f"Unknown encoding {encoding_name}")
     62 constructor = ENCODING_CONSTRUCTORS[encoding_name]
     63 enc = Encoding(**constructor())

ValueError: Unknown encoding gpt2