your_app.py

import cv2

# Initialize the webcam
cap = cv2.VideoCapture(0)

if not cap.isOpened():
    print("Error: Couldn't open the webcam.")
    exit()

while True:
    # Capture frame-by-frame
    ret, frame = cap.read()

    if not ret:
        print("Error: Couldn't read a frame from the webcam.")
        break

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

    # Break the loop when 'q' is pressed
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# Release the webcam and close windows
cap.release()
cv2.destroyAllWindows()