def callback():
try:
dialog.validate()
group_spec = TaskGroupSpec.from_spec_file(dialog.filename)
for spec in group_spec.iter_specs(dialog.start_repeat, dialog.num_repeats):
task = ExternalTask.from_task_spec(spec, niceness=dialog.niceness)
self.taskpile.enqueue(task)
self.update()
except Exception as err:
msg = "Error: "
if isinstance(err, KeyError):
msg += "Undefined replacement key {}".format(str(err))
else:
msg += str(err)
dialog.error = msg
dialog.show()
