Include/cpython/sysmodule.h

#ifndef Py_CPYTHON_SYSMODULE_H
#  error "this header file must not be included directly"
#endif

typedef int(*Py_AuditHookFunction)(const char *, PyObject *, void *);

PyAPI_FUNC(int) PySys_Audit(
    const char *event,
    const char *argFormat,
    ...);
PyAPI_FUNC(int) PySys_AddAuditHook(Py_AuditHookFunction, void*);