ERROR 1045 (28000): Access denied for user 'ODBC'@'localhost' (using password: N O)

工具：python3.6+mysql8.0+pymysql

注意：python2.7以后的版本不再支持 MySQLdb這個模塊。需要用pymysql,在命令行下安裝的方法 輸入pip install pymysql。

import pymysql

conn = pymysql.Connect(
    host='127.0.0.1',
    port=3306,
    user='root',
    passwd='root',
    db='imooc',
    charset='utf8'
)

cursor = conn.cursor()
sql = 'select * from students'
# print(cursor)
cursor.execute(sql)
print(cursor.fetchall())

cursor.close()
conn.close()

執行這段代碼出錯 ： pymysql.err.OperationalError: (1045, u"Access denied for user 'root'@'localhost' (using password: No)")

新版mysql使用的caching_sha2_password認證方式，換成mysql_native_password就可以。

步驟是在cmd命令行連接mysql, 

然后輸入ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'root';