Victor Stinner firstname.lastname@example.org:
If a system call fails with ``EINTR``, Python must call signal handlers: call ``PyErr_CheckSignals()``. If a signal handler raises an exception, the Python function fails with the exception. Otherwise, the system call is retried. If the system call takes a timeout parameter, the timeout is recomputed.
Signals are tricky and easy to get wrong, to be sure, but I think it is dangerous for Python to unconditionally commandeer signal handling. If the proposition is accepted, there should be a way to opt out.