python之mysql登录验证

from dotenv import load_dotenv
import pymysql
import os
load_dotenv()
connection = pymysql.connect(
host=os.getenv("HOST"),
database=os.getenv("DATABASE"),
user=os.getenv("USERNAME"),
password=os.getenv("PASSWORD"),
ssl_ca=os.getenv("SSL_CERT")
)
cursor = connection.cursor()
cursor.execute("select @@version ")
version = cursor.fetchone()
if version:
print('Running version: ', version)
else:
print('Not connected.')
connection.close()