import pymysql
db = pymysql.connect(host='LAPTOP-BG4EHSJU',
user='ln',
password='123456',
database='DB_Library')
cursor = db.cursor()
cursor.execute('select * from TB_Book')
result1 = cursor.fetchall()
print(result1)
db.close()
密码,用户名都没有问题,但是还是一直报错。