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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)

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