code: def check_outputs(self):
          
          self.outputs = self.expand_filenames(self.outputs)
          result = False
          if self.files_exist(self.outputs):
              if self.dependencies_are_newer(self.outputs, self.inputs):
                  result = True
                  print("Dependencies are newer than outputs.")
                  print("Running task.")
              elif self.force:
                  print("Dependencies are older than inputs, but 'force' option present.")
                  print("Running task.")
                  result = True
              else:
                  print("Dependencies are older than inputs.")
          else:
              print("No ouput file(s).")
              print("Running task.")
              result = True
          return result
docs: Check for the existence of output files