Python Signal Module: Handling Software Interrupts

The 'signal' module in Python provides mechanisms to handle signals received by the process. Signals are software interrupts sent to a process to notify it of an event. For example, the SIGINT signal is sent to a process when the user presses Ctrl+C. The process can define signal handlers to handle these signals.

The 'signal' module defines a set of standard signals, such as SIGINT, SIGTERM, SIGABRT, etc. The module also provides functions to set and get signal handlers, and to raise signals manually.

The module also provides platform-specific functionality, such as setting a wakeup file descriptor on Unix systems, and sending signals to processes using process file descriptors on Linux.

The module is primarily used for handling signals in Unix-based systems, but it also works on Windows systems. However, the set of signals that are available and their behavior may differ on Windows systems.