I am learning how to use signals. I created a small program that connects to a database and prints the results. I am leaving the database connection open. I am sending a SIGTERM to end the program. That works. But when I try to add my database disconnect object it fails. I made db global. Any help or explanation of what I am doing incorrectly. My plan to to clean up socket connections and others to shut the program down gracefully.

global db
def term_handler(signum,frame):
    print('In term handler')
    db.disconnect()
    #more clean up to come.
    sys.exit()

def main():
   db = connection
   results = db.select('query here')
   print(results.fetchall())
   #db.disconnect()
   # The above disconnect works when in main.  but fails when in term_handler

  signal.signal(signal.SIGTERM,term_handler)

  while True:
      print('yes')
      sleep(2)
  return None
if __name__ == "__main__":
  main()