#signal — Set handlers for #asynchronous events
This module provides mechanisms to use signal handlers in Python.
The signal.signal() function allows to define custom handlers to be executed when a signal is received. A small number of default handlers are installed: #SIGPIPE is ignored (so write errors on pipes and sockets can be reported as ordinary Python exceptions) and #SIGINT is translated into a KeyboardInterrupt exception.
#Asyncio
https://docs.python.org/3.4/library/signal.html