      def is_alive(self):
          """ Return true if any thread is alive else false """
          return any(thread.is_alive() for thread in self._threads)
  
      def start(self):
          """ Start a thread with the given method and args """
          logger.debug("Starting thread(s): '%s'", self._name)
          for idx in range(self._thread_count):
              name = "{}_{}".format(self._name, idx)
              logger.debug("Starting thread %s of %s: '%s'",
                           idx + 1, self._thread_count, name)
 
</s> remove             name = "{}_{}".format(self._name, idx)
 </s> add             name = self._name if self._thread_count == 1 else f"{self._name}_{idx}" </s> remove     def is_alive(self):
        """ Return true if any thread is alive else false """
 </s> add     def is_alive(self) -> bool:
        """ Check if any threads are still alive

        Returns
        -------
        bool
            ``True`` if any threads are alive. ``False`` if no threads are alive
        """ </s> remove     def has_error(self):
        """ Return true if a thread has errored, otherwise false """
 </s> add     def has_error(self) -> bool:
        """ bool: ``True`` if a thread has errored, otherwise ``False`` """ </s> remove     def errors(self):
        """ Return a list of thread errors """
 </s> add     def errors(self) -> List[_ErrorType]:
        """ list: List of thread error values """ </s> remove     def join(self):
 </s> add     def join(self) -> None:
    def start(self) -> None:
        """ Start all the threads for the given method, args and kwargs """
      def is_alive(self):
          """ Return true if any thread is alive else false """
          return any(thread.is_alive() for thread in self._threads)
  
    def start(self) -> None:
        """ Start all the threads for the given method, args and kwargs """
    def start(self) -> None:
        """ Start all the threads for the given method, args and kwargs """
          logger.debug("Starting thread(s): '%s'", self._name)
          for idx in range(self._thread_count):
              name = "{}_{}".format(self._name, idx)
              logger.debug("Starting thread %s of %s: '%s'",
                           idx + 1, self._thread_count, name)
keep keep keep keep replace replace keep keep keep keep keep
 bugfix - timelapse image loader
multithreading.py - typing + docs 
lib/multithreading.py