python-mysqlHow can I resolve an "access denied for user" error when connecting to a MySQL database using Python?

To resolve an "access denied for user" error when connecting to a MySQL database using Python, you need to make sure that the user has the correct privileges to access the database. To do this, you can use the following code to connect to the MySQL database and check the user's privileges:

import mysql.connector

mydb = mysql.connector.connect(
    host="localhost",
    user="yourusername",
    passwd="yourpassword"
)

mycursor = mydb.cursor()

mycursor.execute("SHOW GRANTS FOR 'yourusername'@'localhost';")

for x in mycursor:
    print(x)

The output of this code will be a list of all the privileges the user has. If the user does not have the correct privileges, you can grant them the necessary privileges using the following command:

GRANT ALL PRIVILEGES ON *.* TO 'username'@'localhost';

Once you have granted the user the correct privileges, you should be able to connect to the MySQL database using Python without any errors.

Code explanation

1. import mysql.connector: imports the mysql.connector library which allows us to connect to the MySQL database.
2. mydb = mysql.connector.connect(...): connects to the MySQL database using the specified credentials.
3. mycursor.execute("SHOW GRANTS FOR 'yourusername'@'localhost';"): shows the privileges the user has.
4. GRANT ALL PRIVILEGES ON *.* TO 'username'@'localhost';: grants the user the necessary privileges.

Helpful links

• MySQL Documentation - SHOW GRANTS
• MySQL Documentation - GRANT

Edit this code on GitHub