code: def test_positive_power(self):
      for p in [0.3, 1.0, 3.0]:
          self._test(lambda _: T.PositivePowerTransform(p), event_dim=0)
  
imports: import operator
  from functools import partial, reduce
  from unittest import TestCase
  import pytest
  import torch
  import pyro.distributions
  import pyro.distributions.transforms
  from pyro.distributions import constraints
  from tests.common import assert_close
label_desc: Use image node_id 42 for calling the TransformTests obj's underlying member method code with example usage: obj.test_positive_power() without return types