cysignals

import cython import os # This code needs to be in a .pyx file to be compiled by Cython # For demonstration, we simulate compilation by directly defining in Python context # In a real scenario, this would be compiled with a setup.py/pyproject.toml def run_interruptible_loop(n_iterations: int): try: # In a .pyx file, you would use: from cysignals.signals cimport sig_check # For this quickstart, we use a mock for illustration in a .py file # In practice, you'd compile this Cython code. # This is a simplified representation of how sig_check would be used. # Simulate Cython compilation and execution print(f"Running a loop for {n_iterations} iterations. Try pressing CTRL+C.") for i in range(n_iterations): # Imagine this is within a Cython function containing a `sig_check()` call if i % 1_000_000 == 0: print(f" Iteration {i}") # A real sig_check() would check for interrupts and raise KeyboardInterrupt # if os.getenv('CYSIGNALS_SIMULATE_INTERRUPT') and i == n_iterations // 2: # raise KeyboardInterrupt("Simulated interrupt") # Simulate a small amount of work _ = i * i print("Loop completed without interruption.") except KeyboardInterrupt: print("\nLoop interrupted by user (KeyboardInterrupt caught)!") except Exception as e: print(f"An unexpected error occurred: {e}") if __name__ == '__main__': # This part would run the compiled Cython module # For this example, we directly call the Python function simulating the loop. run_interruptible_loop(10_000_000)