code: def setUp(self) -> None:
      super().setUp()
      torch.manual_seed(1)
  
file_path: pytorch3d/tests/test_sample_pdf.py
imports: import unittest
  from itertools import product
  import torch
  from pytorch3d.renderer.implicit.sample_pdf import sample_pdf, sample_pdf_python
  from .common_testing import TestCaseMixin
label_desc: Use image node_id 1 for calling the TestSamplePDF obj's underlying member method code with example usage: obj.setUp() without return types