pip install opencv-python

pip install pyzbar

import cv2
from pyzbar import pyzbar
# 1、读取二维码图片
qrcode = cv2.imread('qrcode.jpg')
# 2、解析二维码中的数据
data = pyzbar.decode(qrcode)
print(data)
# 3、在数据中解析出二维码的data信息
text = data[0].data.decode('utf-8')
print(text)

[Decoded(data=b'http://weixin.qq.com/r/vC_fhynEKnRVrW3k93qu', type='QRCODE', rect=Rect(left=140, top=113, width=390, height=390), polygon=[Point(x=140, y=113), Point(x=140, y=503), Point(x=530, y=503), Point(x=530, y=113)])]

text = data[0].data.decode('utf-8')

def scan_qrcode(img_path):
 qrcode = cv2.imread(img_path)
 data = pyzbar.decode(qrcode)
 return data[0].data.decode('utf-8')

import cv2
# 调用摄像头
cap = cv2.VideoCapture(0)
while True:
 # 读取一帧画面
 ret, frame = cap.read()
 # 显示当前帧
 cv2.imshow('scan qrcode', frame)
 # 等待键盘输入
 key = cv2.waitKey(10)
 # 当按下q键时关闭摄像头
 if key == ord('q'):
  break
# 销毁所有窗口
cv2.destroyAllWindows()

import cv2
from pyzbar import pyzbar

def scan_qrcode(qrcode):
 data = pyzbar.decode(qrcode)
 return data[0].data.decode('utf-8')

cap = cv2.VideoCapture(0)
while True:
 ret, frame = cap.read()
 cv2.imshow('scan qrcode', frame)

 # 解析二维码
 text = None
 try:
  text = scan_qrcode(frame)
 except Exception as e:
  pass
 if text:
  print(text)
  break

 key = cv2.waitKey(10)
 if key == ord('q'):
  break
cv2.destroyAllWindows()