python3连接mysql

import mysql.connector
import sys
user = 'root'
pwd = '123456'
host = 'localhost'
db = 'magento'
conn = mysql.connector.connect(user=user, password = pwd, host=host, database=db)
cursor = conn.cursor()
data = conn.cursor()
tables = []
try:
cursor.execute('SHOW TABLES')

for (table_name,) in cursor:
tables.append(table_name)

except mysql.connector.Error as err:
print('Error:')
print(err.msg)
sys.exit()

cursor.close();
#print(tables)
for tn in tables:

#data = conn.cursor()
try:
sql = 'DROP TABLE `' + tn + '`;'
data.execute(sql)
print(sql)
except mysql.connector.Error as err:
print('Error:')
print(err.msg)
#sys.exit()

#data.close()

conn.commit()
conn.close()