Some suggestions for
https://docs.python.org/3.9/c-api/sys.html#c.PySys_AddAuditHook
https://docs.python.org/3.9/library/sys.html#sys.addaudithook

"Adds to the collection of active auditing hooks"
"Adds the callable hook to the collection of active auditing hooks"

Change 'Adds' to 'Add' or maybe 'Append' (see near below).
Insert 'the callable hook' in PySys version.
Change 'collection' to 'sequence' or 'list' (and change verb to 'append') since order is important.

PySys version:

I think the 'userData' explanation should be closer to the top.  

Grammar: "Functions in the runtime and standard library that raise events include the details in each function’s documentation and listed in the audit events table." is not a proper sentence.  Its 'skeleton' is "Functions ... include the details ... and listed ... .  

Either change 'include the details' to 'are detailed' and 'listed' to 'are listed' or split into two sentences:

"Functions in the runtime and standard library that raise events are  listed in the audit events table.  Details are in each function’s documentation.

Both, again:

"raises a auditing event".  'a' should be  'an'.  To me, this is slightly confusing because Python raises exceptions, but auditing events are not exceptions and do not normally abort execution.  Perhaps "This call is a 'sys.addaudithook' event with no arguments that triggers an audit call."


https://docs.python.org/3.9/c-api/sys.html#c.PySys_Audit
https://docs.python.org/3.9/library/sys.html#sys.audit

Change 'Raises' to 'Raise'.


https://docs.python.org/3.8/library/audit_events.html

On pydev, Steve said "(though some won't be raised until 3.8.1... we should probably mark those, or at least update that page to warn that events may have been added over time)."