python中带有mysql-connector的未知数据库

Question

I'm new to dealing with databases. I created a simple database in phpmyadmin and joined it with another database. Now I'm trying to access the database in python with the mysql-connector module, but python doesn't seem to be able to detect it. I've named and saved my database as the one below, but I have no idea if this even connects or can find it. I converted the DB to a .sql, but I don't know what to do with it.

import mysql.connector

mydb = mysql.connector.connect(
    host='localhost',
    user='root',
    password='',
    database='python_sql',
    )

Furthermore, I have practically no knowledge of PHP, so I wasn't able to write some fancy script as some do. I see in the tutorials people get through this step no problem even when they make the program in phpmyadmin, so I don't know whats wrong with my code. When I run it, I get the following error.

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/mysql/connector/connection_cext.py", line 216, in _open_connection
    self._cmysql.connect(**cnx_kwargs)
_mysql_connector.MySQLInterfaceError: Unknown database 'python_sql'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/johnminton/Documents/Python/Python database internal/mysql-db.py", line 7, in <module>
    database='python_sql'
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/mysql/connector/__init__.py", line 264, in connect
    return CMySQLConnection(*args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/mysql/connector/connection_cext.py", line 80, in __init__
    self.connect(**kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/mysql/connector/abstracts.py", line 966, in connect
    self._open_connection()
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/mysql/connector/connection_cext.py", line 219, in _open_connection
    sqlstate=exc.sqlstate)
mysql.connector.errors.ProgrammingError: 1049 (42000): Unknown database 'python_sql'

EDIT: when I remove the 'database=python_sql' I get no error, so it seems to connect fine to my localhost

Answer 1

in this code, you can handle most errors that happened because connect

from mysql.connector import errorcode
try:
  myconn = mysql.connector.connect(
      host='your host name ',
      user='username',
      passwd='Password to access',
      database='DataBase Name')
except mysql.connector.Error as err:
    if err.errno == errorcode.ER_ACCESS_DENIED_ERROR:
        print("Something is wrong with your user name or password")
    elif err.errno == errorcode.ER_BAD_DB_ERROR:
        myconn = mysql.connector.connect(
            host='localhost',
            user='root',
            passwd='1234',
        )
        mycurs = myconn.cursor()
        mycurs.execute("CREATE DATABASE ttt")
        myconn = mysql.connector.connect(
            host='localhost',
            user='root',
            passwd='1234',
            database='ttt'
        )
    else:
        print(err)
else:
  myconn.close()