code: def test_load_source(self):
      test_source = textwrap.dedent(
          """
        # coding=utf-8
        def f(a):
          '日本語 Δθₜ ← Δθₜ₋₁ + ∇Q(sₜ, aₜ)(rₜ + γₜ₊₁ max Q(⋅))'
          return a + 1
      """
      )
      module, _ = loader.load_source(test_source, delete_on_exit=True)
      self.assertEqual(module.f(1), 2)
      self.assertEqual(
          module.f.__doc__,
          "日本語 Δθₜ ← Δθₜ₋₁ + ∇Q(sₜ, aₜ)(rₜ + γₜ₊₁ max Q(⋅))",
      )
  
file_path: DALI/dali/test/python/autograph/pyct/test_loader.py
imports: import inspect
  import os
  import textwrap
  import unittest
  import gast
  from nvidia.dali._autograph.pyct import ast_util
  from nvidia.dali._autograph.pyct import loader
  from nvidia.dali._autograph.pyct import parser
  from nvidia.dali._autograph.pyct import pretty_printer
label_desc: Use image node_id 4 for calling the LoaderTest obj's underlying member method code with example usage: obj.test_load_source() without return types