Is there a good way to block network request within a test in pants? We want to force dev's to always mock things out and was wondering if there was a easy way to do this. The concern is that building the pytest pex file could reach out over network so would fail.

maybe https://pypi.org/project/pytest-socket/ ?

That looks promising. I don't know of any way for Pants itself to turn off network access

another way would be to use the

sys.audit

mechanism to trap socket audit events and raise an exception to abort the operation. https://docs.python.org/3/library/sys.html#sys.addaudithook

This is perfect