old_contents: from nycodex import db
  
  if __name__ == "__main__":
      db.Base.metadata.drop_all(db.engine)
  
new_contents: import sqlalchemy
  
  from nycodex import db
  
  if __name__ == "__main__":
      metadata = sqlalchemy.MetaData()
      metadata.reflect(bind=db.engine)
      with db.engine.connect() as conn:
          for key in metadata.tables:
              conn.execute(f"DROP TABLE \"{key}\" CASCADE")
  
subject: Fix drop_all.py