code: def test_index_tuple(self):
      self.assertEqual(index_((1, 2, 3, 4), 1), 0)
      self.assertEqual(index_((1, 2, 3, 4), 4), 3)
  
file_path: streamlit/lib/tests/streamlit/index_test.py
imports: import unittest
  import numpy
  import pandas
  from streamlit.util import index_
label_desc: Use image node_id 3 for calling the Index_Test obj's underlying member method code with example usage: obj.test_index_tuple() without return types