import mysql.connector
from mysql.connector import Error
try:
connection = mysql.connector.connect(host='localhost',
database='Electronics',
user='pynative',
password='pynative@#29')
if connection.is_connected():
db_Info = connection.get_server_info()
print("Connected to MySQL Server version ", db_Info)
cursor = connection.cursor()
cursor.execute("select database();")
record = cursor.fetchone()
print("You're connected to database: ", record)
except Error as e:
print("Error while connecting to MySQL", e)
finally:
if connection.is_connected():
cursor.close()
connection.close()
print("MySQL connection is closed")
I know this should work because I have the code copied from a website. But for some reason it show s the error
‘if connection.is_connected():
NameError: name ‘connection’ is not defined’
>Solution :
If the mysql.connector.connect raisesan error, then connection variabe is never defined and you can’t use it in the finally.
A solution is to initialize it as None and check that it isn’t none before using it in the finally
connection = None
try:
connection = mysql.connector.connect(host='localhost',
database='Electronics',
user='pynative',
password='pynative@#29')
if connection.is_connected():
db_Info = connection.get_server_info()
print("Connected to MySQL Server version ", db_Info)
cursor = connection.cursor()
cursor.execute("select database();")
record = cursor.fetchone()
print("You're connected to database: ", record)
except Error as e:
print("Error while connecting to MySQL", e)
finally:
if connection and connection.is_connected():
cursor.close()
connection.close()
print("MySQL connection is closed")