code: def live_processes(self):
          
          result = []
          for process_type, process_infos in self.all_processes.items():
              for process_info in process_infos:
                  if process_info.process.poll() is None:
                      result.append((process_type, process_info.process))
          return result
docs: Return a list of the live processes.
  
          Returns:
              A list of the live processes.