user12354454 :
I'm trying to connect mysql and change info but isn't work.
main.py
import pymysql
def connect_setting():
# Trying to connect
db_connection = None
try:
db_connection = pymysql.connect(
user='db',
passwd='password',
host='127.0.0.1',
db='test',
charset='utf8'
)
# If connection is not successful
except:
print("Can't connect to database")
return 0
# If Connection Is Successful
print("Connected")
# Making Cursor Object For Query Execution
global cursor
cursor = db_connection.cursor()
def get_off():
sql = '''INSERT INTO `-100`'''
cursor.execute(sql)
db_connection.commit()
index.py
from main import get_off as sql
sql()
error
raceback (most recent call last):
File "/workspace/Kakao_points/index.py", line 3, in <module>
sql()
File "/workspace/Kakao_points/main.py", line 30, in get_off
cursor.execute(sql)
NameError: name 'cursor' is not defined
I already defined cursor but somehow python didn't get info in next def I guess.. anybody please help..?
Barmar :
You're only setting cursor when the connection fails, because you put those lines in the except: block. Those two lines should be in the try: block.
You also need to make db_connection global so you can use it in the other function.
def connect_setting():
global db_connection
# Trying to connect
db_connection = None
try:
db_connection = pymysql.connect(
user='db',
passwd='password',
host='127.0.0.1',
db='test',
charset='utf8'
)
# Making Cursor Object For Query Execution
global cursor
cursor = db_connection.cursor()
# If Connection Is Successful
print("Connected")
# If connection is not successful
except:
print("Can't connect to database")
return 0
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