MySQLdb._exceptions.OperationalError OperationalError: (1045, "Access denied for user 'root'@'localhost' (using password: YES)")答案

【问题标题】：MySQLdb._exceptions.OperationalError OperationalError: (1045, "Access denied for user 'root'@'localhost' (using password: YES)")MySQLdb._exceptions.OperationalError OperationalError: (1045, "Access denied for user 'root'@'localhost' (using password: YES)")
【发布时间】：2020-03-02 13:12:18
【问题描述】：

我正在尝试使用 mysql 来运行 python-flask Web 应用程序。但是，我在主应用程序文件中连接到数据库，每次尝试将数据输入数据库（即注册客户）时，我都会收到错误消息：

Traceback (most recent call last):
  File "/home/<username>/.local/lib/python2.7/site-packages/flask/app.py", line 2463, in __call__
    return self.wsgi_app(environ, start_response)
  File "/home/<username>/.local/lib/python2.7/site-packages/flask/app.py", line 2449, in wsgi_app
    response = self.handle_exception(e)
  File "/home/<username>/.local/lib/python2.7/site-packages/flask/app.py", line 1866, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/home/<username>/.local/lib/python2.7/site-packages/flask/app.py", line 2446, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/<username>/.local/lib/python2.7/site-packages/flask/app.py", line 1951, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/<username>/.local/lib/python2.7/site-packages/flask/app.py", line 1820, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/<username>/.local/lib/python2.7/site-packages/flask/app.py", line 1949, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/<username>/.local/lib/python2.7/site-packages/flask/app.py", line 1935, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/mnt/c/Users/<username>/Documents/<web application>/app.py", line 156, in register
    cur = mysql.connection.cursor()
  File "/home/<username>/.local/lib/python2.7/site-packages/flask_mysqldb/__init__.py", line 94, in connection
    ctx.mysql_db = self.connect
  File "/home/<username>/.local/lib/python2.7/site-packages/flask_mysqldb/__init__.py", line 81, in connect
    return MySQLdb.connect(**kwargs)
  File "/home/<username>/.local/lib/python2.7/site-packages/MySQLdb/__init__.py", line 84, in Connect
    return Connection(*args, **kwargs)
  File "/home/<username>/.local/lib/python2.7/site-packages/MySQLdb/connections.py", line 179, in __init__
    super(Connection, self).__init__(*args, **kwargs2)
OperationalError: (1045, "Access denied for user 'root'@'localhost' (using password: YES)")

我看过类似的文章，主要建议是：

(in sql)
USE mysql;
UPDATE mysql.user SET plugin = 'mysql_native_password' WHERE User='root';
flush privileges;
exit;

(in terminal): sudo service mysql restart

我如何配置数据库：

# Config MySQL
app.config['MYSQL_HOST'] = 'localhost'
app.config['MYSQL_USER'] = 'root'
app.config['MYSQL_PASSWORD'] = '<root password>'
app.config['MYSQL_DB'] = '<db name>'
app.config['MYSQL_CURSORCLASS'] = 'DictCursor'
#init MYSQL
mysql= MySQL(app)

但是，尝试此操作后错误仍然存在。我不确定如何继续，因此我们将不胜感激。

【问题讨论】：

所以您可以（直接）登录 MySQL 并执行查询，但不能通过您的应用程序？你能提供你的数据库配置吗？可能是字符解析不正确。
@ikyuchukov 是的，我可以进入 mysql 并创建数据库和表。并将配置添加到问题中。

标签： python mysql ubuntu flask

【解决方案1】：

如果您在正常登录 MySQL 时能够进行查询，那么应该没有理由不能在应用程序中进行查询（使用相同的用户/密码）。

我建议检查您的密码是否包含任何可能无法正确解析的字符，例如' \。

如果您没有发现密码有任何问题，您可以尝试在执行任何查询之前从应用程序连接到 MySQL，然后查看连接是否成功。

【讨论】：