import os

from sqlalchemy.ext.automap import automap_base
from sqlalchemy.orm import sessionmaker
from sqlalchemy import create_engine
from sqlalchemy.orm.scoping import scoped_session
from sqlalchemy.pool import NullPool

DB_URL = os.environ.get('DB_URL')

if not DB_URL:
    raise ValueError("DB_URL not present in the environment")

Base = automap_base()
engine = create_engine(DB_URL, poolclass=NullPool)
Base.prepare(engine, reflect=True)

session_factory = sessionmaker(bind=engine, expire_on_commit=False)
Session = scoped_session(session_factory)

import os

from sqlalchemy.ext.automap import automap_base
from sqlalchemy.orm import sessionmaker
from sqlalchemy import create_engine
from sqlalchemy.orm.scoping import scoped_session
from sqlalchemy.pool import NullPool

AIRFLOW_CONN_MYSQL_TRACKER = os.environ.get('AIRFLOW_CONN_MYSQL_TRACKER')

if not AIRFLOW_CONN_MYSQL_TRACKER:
    raise ValueError("AIRFLOW_CONN_MYSQL_TRACKER not present in the environment")

Base = automap_base()
engine = create_engine(DB_URL, poolclass=NullPool)
Base.prepare(engine, reflect=True)

session_factory = sessionmaker(bind=engine, expire_on_commit=False)
Session = scoped_session(session_factory)

Add Mysql Tracker database to store our data
Add Mysql Tracker database to store our data

  import os
  
  from sqlalchemy.ext.automap import automap_base
  from sqlalchemy.orm import sessionmaker
  from sqlalchemy import create_engine
  from sqlalchemy.orm.scoping import scoped_session
  from sqlalchemy.pool import NullPool
  
- DB_URL = os.environ.get('DB_URL')
+ AIRFLOW_CONN_MYSQL_TRACKER = os.environ.get('AIRFLOW_CONN_MYSQL_TRACKER')
  
- if not DB_URL:
+ if not AIRFLOW_CONN_MYSQL_TRACKER:
-     raise ValueError("DB_URL not present in the environment")
+     raise ValueError("AIRFLOW_CONN_MYSQL_TRACKER not present in the environment")
  
  Base = automap_base()
  engine = create_engine(DB_URL, poolclass=NullPool)
  Base.prepare(engine, reflect=True)
  
  session_factory = sessionmaker(bind=engine, expire_on_commit=False)
  Session = scoped_session(session_factory)
  
Add Mysql Tracker database to store our data
## Code Before:
import os

from sqlalchemy.ext.automap import automap_base
from sqlalchemy.orm import sessionmaker
from sqlalchemy import create_engine
from sqlalchemy.orm.scoping import scoped_session
from sqlalchemy.pool import NullPool

DB_URL = os.environ.get('DB_URL')

if not DB_URL:
    raise ValueError("DB_URL not present in the environment")

Base = automap_base()
engine = create_engine(DB_URL, poolclass=NullPool)
Base.prepare(engine, reflect=True)

session_factory = sessionmaker(bind=engine, expire_on_commit=False)
Session = scoped_session(session_factory)

## Instruction:
Add Mysql Tracker database to store our data
## Code After:
import os

from sqlalchemy.ext.automap import automap_base
from sqlalchemy.orm import sessionmaker
from sqlalchemy import create_engine
from sqlalchemy.orm.scoping import scoped_session
from sqlalchemy.pool import NullPool

AIRFLOW_CONN_MYSQL_TRACKER = os.environ.get('AIRFLOW_CONN_MYSQL_TRACKER')

if not AIRFLOW_CONN_MYSQL_TRACKER:
    raise ValueError("AIRFLOW_CONN_MYSQL_TRACKER not present in the environment")

Base = automap_base()
engine = create_engine(DB_URL, poolclass=NullPool)
Base.prepare(engine, reflect=True)

session_factory = sessionmaker(bind=engine, expire_on_commit=False)
Session = scoped_session(session_factory)
