what works with the with statement?

[DeaD_EyE]

First attempt to get filename where __enter__ occours:

grep -Rl __enter__ .pyenv/versions/3.11.0a3 | egrep ".py$" | xargs -n1 basename  | egrep -v "^test|^_" | sort -u

To gather more information, you have to use some functions from inspect.