code: def random_coordinates():
      return "{}.{}.{}".format(
          random.randint(1, 4),
          (random.randint(1, 12), random.randint(1, 12)),
          random.randint(1, 99),
      )
  
imports: import random
  import unittest
  from typing import Optional
  from unittest import TestCase, mock
  from unittest.mock import MagicMock, call, mock_open
  from streamlit.runtime.media_file_manager import MediaFileManager
  from streamlit.runtime.media_file_storage import MediaFileKind
  from streamlit.runtime.memory_media_file_storage import MemoryFile, MemoryMediaFileStorage, _calculate_file_id
  from tests.exception_capturing_thread import call_on_threads
label_desc: Use image node_id 1 for calling a global function with example usage: random_coordinates() and returns: str