code: def is_valid_coordinates_regular_expression(coordinates):
      return bool(
          re.match(
              "-?(\d|[1-8]\d|90)\.?\d*, -?(\d|[1-9]\d|1[0-7]\d|180)\.?\d*$",
              coordinates,
          )
      )
  
label_desc: Use image node_id 3 for calling a global function with example usage: is_valid_coordinates_regular_expression(coordinates) and returns: bool