Assume a python program sets a handler function for the `signal.SIGALRM` signal, and then schedules an alarm in T seconds with `signal.alarm(T)`.
Assume the program later cancels any scheduled alarm with `signal.alarm(0)`. Can the program safely assume that after the call to `signal.alarm(0)` completes no alarm handling function will be called? The reason I ask is that the signal module documentation [1] says that: "A Python signal handler does not get executed inside the low-level (C) signal handler. Instead, the low-level signal handler sets a flag which tells the virtual machine to execute the corresponding Python signal handler at a later point(for example at the next bytecode instruction)." Since this "later point" is not specified, could it be that a the alarm is triggered and calls the low-level C handler shortly before the call to `signal.alarm(0)`, but the python signal handler is only executed at some point after this call? [1]: https://docs.python.org/3.6/library/signal.html#execution-of-python-signal-handlers) -- https://mail.python.org/mailman/listinfo/python-list