为什么我使用python和mysql获得了不存在的弱引用对象

Question

我试图运行这段代码，但在第6行出现弱引用错误

import mysql.connector as mysql
con=mysql.connect(host='localhost',user='root')
cursor=con.cursor()
cursor.execute('Create database if not exists shivam')
con=mysql.connect(host='localhost',user='root',database='shivam')
cursor.execute('use shivam')
cursor.execute('slect * from item') #this is a table in my database
data=cursor.fetchall()
print(data)
con.commit()
con.close()