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

#img = cv2.imread('1.png')
cap = cv2.VideoCapture(0)
cap.set(3,640)
cap.set(4,480)

while True:

    success, img = cap.read()
    for barcode in decode(img):
        myData = barcode.data.decode('utf-8')
        print(myData)
        pts = np.array([barcode.polygon],np.int32)
        pts = pts.reshape((-1,1,2))
        cv2.polylines(img,[pts],True,(255,0,255),5)
        pts2 = barcode.rect
        cv2.putText(img,myData,(pts2[0],pts2[1]),cv2.FONT_HERSHEY_SIMPLEX, 0.9,(255,0,255),2)

    cv2.imshow('Result',img)
    cv2.waitKey(1)

/////////////////////////////////////////////////////////////////////////
Project.py




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

#img = cv2.imread('1.png')
cap = cv2.VideoCapture(0)
cap.set(3,640)
cap.set(4,480)

with open('myDataFile.text') as f:
    myDataList = f.read().splitlines()

while True:

    success, img = cap.read()
    for barcode in decode(img):
        myData = barcode.data.decode('utf-8')
        print(myData)

        if myData in myDataList:
            myOutput = 'Authorized'
            myColor = (0,255,0)
        else:
            myOutput = 'Un-Authorized'
            myColor = (0, 0, 255)

        pts = np.array([barcode.polygon],np.int32)
        pts = pts.reshape((-1,1,2))
        cv2.polylines(img,[pts],True,myColor,5)
        pts2 = barcode.rect
        cv2.putText(img,myOutput,(pts2[0],pts2[1]),cv2.FONT_HERSHEY_SIMPLEX,
                    0.9,myColor,2)

    cv2.imshow('Result',img)
    cv2.waitKey(1)