It now supports a "full" fallback to _PyFunction_GetXIData() and then `_PyPickle_GetXIData()`.
There's also room for other fallback modes if that later makes sense.
(cherry picked from commit 88f8102a8f, AKA gh-133482)
Co-authored-by: Eric Snow <ericsnowcurrently@gmail.com>
This converts functions, code, str, bytes, bytearray, and memoryview objects to PyCodeObject,
and ensure that the object looks like a script. That means no args, no return, and no closure.
_PyCode_GetPureScriptXIData() takes it a step further and ensures there are no globals.
We also add _PyObject_SupportedAsScript() to the internal C-API.
(cherry picked from commit c81fa2b9cd, AKA gh-133480)
Co-authored-by: Eric Snow <ericsnowcurrently@gmail.com>
There's some extra complexity due to making sure we we get things right when handling functions and classes defined in the __main__ module. This is also reflected in the tests, including the addition of extra functions in test.support.import_helper.
