code: def test_betas(self):
      for beta_start, beta_end in zip([0.0001, 0.001], [0.002, 0.02]):
          self.check_over_configs(
              beta_start=beta_start, beta_end=beta_end
          )
  
imports: import tempfile
  import torch
  from diffusers import PNDMScheduler
  from .test_schedulers import SchedulerCommonTest
label_desc: Use image node_id 9 for calling the PNDMSchedulerTest obj's underlying member method code with example usage: obj.test_betas() without return types