Remove traceback in Python on Ctrl-C

Remove traceback in Python on Ctrl-C

In Python, when you interrupt a running script with Ctrl-C (KeyboardInterrupt), it typically displays a traceback by default. If you want to suppress the traceback when Ctrl-C is used to interrupt your script, you can catch the KeyboardInterrupt exception and handle it gracefully. Here's an example:

import signal import sys def graceful_shutdown(signum, frame): print("\nCtrl-C detected. Exiting gracefully.") sys.exit(0) # Register the signal handler for Ctrl-C (SIGINT) signal.signal(signal.SIGINT, graceful_shutdown) # Your main code here try: while True: # Your main code logic here pass except KeyboardInterrupt: print("\nCtrl-C detected. Exiting gracefully.") sys.exit(0)

In this code:

  • We import the signal and sys modules.

  • We define a signal handler function graceful_shutdown that will be called when Ctrl-C is detected. Inside this function, we print a message and exit the script with a status code of 0.

  • We register the graceful_shutdown function as the signal handler for Ctrl-C (SIGINT) using signal.signal(signal.SIGINT, graceful_shutdown).

  • Your main code logic goes inside the try block. You can replace the pass statement with your actual code.

  • We use a try block to catch the KeyboardInterrupt exception, which is raised when Ctrl-C is pressed. Inside the exception handler, we print a message and exit gracefully.

With this setup, when you press Ctrl-C, it will trigger the graceful_shutdown function, which will print a message and exit without displaying the traceback. This way, you can handle Ctrl-C interruptions more gracefully in your Python script.

Examples

  1. Python Suppress Traceback on KeyboardInterrupt

    • This query asks how to suppress the traceback output when a script is interrupted with Ctrl-C.
    import signal import sys def signal_handler(sig, frame): print("Process interrupted. Exiting...") sys.exit(0) # Exits without traceback signal.signal(signal.SIGINT, signal_handler) while True: pass # Infinite loop to test Ctrl-C

  2. Prevent Traceback on Ctrl-C in Python

    • This query looks for a way to prevent the traceback output when using Ctrl-C.
    import signal import sys def signal_handler(sig, frame): print("Ctrl-C detected. Stopping gracefully.") sys.exit(0) # Exit without traceback signal.signal(signal.SIGINT, signal_handler) # Simulate a long-running process import time for i in range(10): print(f"Working... {i}") time.sleep(1) # Wait to allow for Ctrl-C interruption

  3. Python Script Exit Without Traceback on Ctrl-C

    • This query is about ensuring a Python script exits cleanly without traceback on Ctrl-C.
    import signal import sys def custom_handler(signal_received, frame): print("Exit signal received. Exiting now...") sys.exit(0) # Clean exit without traceback signal.signal(signal.SIGINT, custom_handler) # Simulate a process that runs indefinitely while True: print("Running...") time.sleep(1) # Provide some time to test Ctrl-C

  4. Handle KeyboardInterrupt Without Traceback in Python

    • This query seeks to handle Ctrl-C without a traceback in Python.
    import signal import sys import time def handler(signum, frame): print("KeyboardInterrupt detected. Exiting without traceback.") sys.exit(0) # Exit cleanly without traceback signal.signal(signal.SIGINT, handler) # Simulate a task that can be interrupted for i in range(5): print(f"Processing... {i}") time.sleep(1)

  5. Graceful Exit on Ctrl-C in Python Without Traceback

    • This query is for a solution to exit gracefully without traceback on Ctrl-C.
    import signal import sys import time def exit_gracefully(signum, frame): print("Interrupted! Exiting gracefully...") sys.exit(0) # Clean exit signal.signal(signal.SIGINT, exit_gracefully) # Simulate some ongoing work for i in range(10): print(f"Doing work... {i}") time.sleep(1)

  6. Python: No Traceback on Ctrl-C Interrupt

    • This query seeks to avoid a traceback when the script is interrupted by Ctrl-C.
    import signal import sys import time def handle_ctrl_c(sig, frame): print("Received Ctrl-C. Stopping now.") sys.exit(0) # Exit without traceback signal.signal(signal.SIGINT, handle_ctrl_c) # Simulate a long-running task for i in range(5): print(f"Task running... {i}") time.sleep(1)

  7. Stop Python Program on Ctrl-C Without Traceback

    • This query is for a method to stop a Python program without traceback on Ctrl-C.
    import signal import sys import time def stop_gracefully(signal_received, frame): print("Stopping due to Ctrl-C. Goodbye!") sys.exit(0) # Clean exit signal.signal(signal.SIGINT, stop_gracefully) # Simulate some background task for i in range(10): print(f"Background task {i}") time.sleep(1) # Allow time for interruption

  8. Python: Exit on Ctrl-C Without Showing Traceback

    • This query seeks to exit a Python script without a traceback when interrupted by Ctrl-C.
    import signal import sys import time def ctrl_c_handler(sig, frame): print("Ctrl-C pressed. Exiting cleanly.") sys.exit(0) # Exit without traceback signal.signal(signal.SIGINT, ctrl_c_handler) # Simulate a task that can be interrupted for i in range(5): print(f"Doing something... {i}") time.sleep(1)

  9. Python: Gracefully Exit Without Traceback on Ctrl-C

    • This query looks for a way to gracefully exit without a traceback on Ctrl-C.
    import signal import sys import time def graceful_exit(signal_received, frame): print("Graceful exit initiated. Goodbye!") sys.exit(0) # Clean exit signal.signal(signal.SIGINT, graceful_exit) # Simulate ongoing work for i in range(10): print(f"Working... {i}") time.sleep(1) # Allow time for interruption

  10. Python: Prevent Traceback on Ctrl-C KeyboardInterrupt

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