old_contents: #! /usr/bin/env python3.6
  # coding: utf-8
  
  # From https://help.pythonanywhere.com/pages/LongRunningTasks/
  import socket
  import sys
  
  import config
  
  
  lock_socket = None  # we want to keep the socket open until the very end of
                      # our script so we use a global variable to avoid going
                      # out of scope and being garbage-collected
  
  def is_lock_free():
      global lock_socket
      lock_socket = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
      try:
          lock_id = config.app_id
          lock_socket.bind(f"\0{lock_id}")
          print(f"Acquired lock {lock_id}")
          return True
      except socket.error:
          # socket already locked, task must already be running
          print(f"Failed to acquire lock {lock_id}")
          return False
  
  
  if not is_lock_free():
      sys.exit()
  
  
  import app
  app.main()
  
new_contents: #! /usr/bin/env python3.6
  # coding: utf-8
  
  # From https://help.pythonanywhere.com/pages/LongRunningTasks/
  import socket
  import sys
  
  import config
  
  
  lock_socket = None  # we want to keep the socket open until the very end of
                      # our script so we use a global variable to avoid going
                      # out of scope and being garbage-collected
  
  def is_lock_free():
      global lock_socket
      lock_socket = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
      try:
          lock_id = config.app_id
          lock_socket.bind(f"\0{lock_id}")
          print(f"Acquired lock {lock_id}")
          return True
      except socket.error:
          # socket already locked, task must already be running
          print(f"Failed to acquire lock {lock_id}")
          return False
  
  
  if not is_lock_free():
      sys.exit()
  
  
  import main
  main.main()
  
subject: fix import after rename