code: def scan():
      
  
      # Initiate the low level drivers
      cflib.crtp.init_drivers(enable_debug_driver=False)
  
      # Scan for Crazyflies
      print('Scanning interfaces for Crazyflies...')
      available = cflib.crtp.scan_interfaces()
      interfaces = [uri for uri, _ in available]
  
      if not interfaces:
          return None
      return choose(interfaces, 'Crazyflies found:', 'Select interface: ')
docs: Scan for Crazyflie and return its URI.