Is it safe to call print in a Python signal handler?

He considers it safe if it's unlikely to crash? That's also true in C. Calling printf in a C signal handler is likely to work. So why does he consider it important in C but "not a practical consideration" in Python? It's more likely to crash in Python than in C because the signal handler takes longer to execute.

What’s really fun is mixing signal handling and threads, especially on Linux. There is a simple way to do it and about a thousand ways that include at least one gotcha.