code: def test_magic_should_just_echo(self):
      tests = [
          "a",
          "a_b",
          "a.b",
          "a[b]",
          "a[0]",
          "a[0].c",
          "a[0].c.foo()",
          "None",
          "0",
          "1",
          "123",
          "False",
          "True",
          "'some string'",
          "b'some bytes'",
          "...",
          "f'some {f} string'",
          "[x for x in range(10)]",
          "(x for x in range(10))",
          "{x: None for x in range(10)}",
      ]
  
      for code in tests:
          actual = _get_variable_name_from_code_str(code)
          self.assertEqual(actual, code)
  
      # Testing with comma at the end
      tests += [
          "foo()",
      ]
  
      for code in tests:
          actual = _get_variable_name_from_code_str(code + ",")
          self.assertEqual(actual, code)
  
imports: import inspect
  import sys
  import unittest
  from unittest.mock import patch
  import numpy
  import pytest
  import streamlit
  from streamlit.elements.doc_string import _get_variable_name_from_code_str
  from tests.delta_generator_test_case import DeltaGeneratorTestCase
label_desc: Use image node_id 5 for calling the GetVariableNameFromCodeStrTest obj's underlying member method code with example usage: obj.test_magic_should_just_echo() without return types