Trying to deploy my code location to Dagster+ and encountering "TypeError: 'type' object is not subscriptable`"

[garethbrickman]

When I try to deploy my code location to Dagster+ I'm encountering this below error being thrown by the fsspec dependency:

File "/usr/local/lib/python3.8/site-packages/fsspec/caching.py", line 40, in <module>
MultiFetcher = Callable[list[[int, int]], bytes] # Maps [(start, end)] to bytes
TypeError: 'type' object is not subscriptable

[garethbrickman]

Looks like you're trying to use Python 3.8, but the fsspec dependency is incompatible with Python versions prior to 3.9. Other dependencies may also be incompatible.

Upgrading would be necessary as Python 3.8 reached its end-of-life late last year and Dagster is only compatible with Python 3.9 or higher.