Python signal handlers operate differently than C handlers, allowing calls to functions like print that would be unsafe in lower-level languages. Because CPython schedules user handlers for later execution during interpreter consistency, the strict C restrictions typically do not apply. However, Python signal handlers are unexpectedly reentrant; if a signal arrives while a handler runs, it can interrupt the first call.

A stress-test involving rapid signal barrage demonstrates that calling print under these extreme conditions can trigger a Runtime Error regarding reentrant calls to buffered writers. While this crash scenario is unlikely in typical real-world applications, the author advises against performing non-trivial work within signal handlers to avoid potential deadlocks or data corruption inherent to unsafe signal management in any language.