def fetch_param(name, default):
  if rospy.has_param(name):
    return rospy.get_param(name)
  else:
    print (name, default) % "parameter [%s] not defined. Defaulting to %.3f"
    return default
dataset/ETHPy150Open osrf/rosbook/teleop_bot/keys_to_twist_with_ramps.py/fetch_param/swapped operands of `%`