读数据库图片判断其是否成功写入图片。

import pymysql import cv2 import numpy as np conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='1234567890', db='studentmemo') cursor = conn.cursor() cursor.execute("SELECT pic FROM student_abnormal")
with open('lc2.jpg', 'wb') as f:     f.write(cursor.fetchone()[0]) print(cursor.fetchone())