barCode.py

import cv2
import numpy as np
from pyzbar.pyzbar import decode

def readBarCode():
    camera_id = 0
    delay = 1
    window_name = 'OpenCV pyzbar'

    cap = cv2.VideoCapture(camera_id)

    while True:
        ret, frame = cap.read()

        if ret:
            for d in decode(frame):
                s = d.data.decode()
                print(s)
                frame = cv2.rectangle(frame, (d.rect.left, d.rect.top),
                                    (d.rect.left + d.rect.width, d.rect.top + d.rect.height), (0, 255, 0), 3)
                frame = cv2.putText(frame, s, (d.rect.left, d.rect.top + d.rect.height),
                                    cv2.FONT_HERSHEY_SIMPLEX, 2, (0, 0, 255), 2, cv2.LINE_AA)
            cv2.imshow(window_name, frame)

        if cv2.waitKey(delay) & 0xFF == ord('q'):
            break

    cv2.destroyWindow(window_name)


if __name__ == "__main__":
    readBarCode()