code: def outstanding(self):
          
          # Allow the same WorkItem to be yielded multiple times but not
          # count towards blocking the barrier.
          done_count = 0
          for item in self:
              if not self.wait_any and item.fire_and_forget:
                  # Only count fire_and_forget items as done if this is
                  # *not* a WaitAny barrier. We only want to return control
                  # to the caller when at least one of the blocking items
                  # has completed.
                  done_count += 1
              elif item.done:
                  done_count += 1
  
          if self.wait_any and done_count > 0:
              return False
  
          if done_count == len(self):
              return False
  
          return True
docs: Returns whether or not this barrier has pending work.