cam.py

import cv2

def main():
    # Initialize the webcam (0 is usually the default camera)
    cap = cv2.VideoCapture(0)
    if not cap.isOpened():
        print("Cannot open camera")
        return

    while True:
        # Capture frame-by-frame
        ret, frame = cap.read()
        if not ret:
            print("Failed to grab frame")
            break

        # Display the resulting frame
        cv2.imshow("Webcam", frame)

        # Press 'q' to exit
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break

    # When everything done, release the capture
    cap.release()
    cv2.destroyAllWindows()

if __name__ == "__main__":
    main()