Issue with executing lectures

[NamburiSrinath]

Hi,

Thanks for open sourcing CS336, this is an excellent material to learn :)

I am facing an issue when executing lectures - python execute.py -m lecture_06

Traceback (most recent call last):
  File "/Desktop/spring2025-lectures/execute.py", line 13, in <module>
    from execute_util import Rendering, pop_renderings
  File "/Desktop/spring2025-lectures/execute_util.py", line 12, in <module>
    from arxiv_util import is_arxiv_link, arxiv_reference
  File "/Desktop/spring2025-lectures/arxiv_util.py", line 4, in <module>
    from reference import Reference
  File "/Desktop/spring2025-lectures/reference.py", line 4, in <module>
    class Reference:
  File "/Desktop/spring2025-lectures/reference.py", line 5, in Reference
    title: str | None = None
TypeError: unsupported operand type(s) for |: 'type' and 'NoneType'

This most probably might be because of the packages, so is it possible to update the readme for initial setup.

Looking forward

[percyliang]

You need Python >= 3.10.