code: def setUp(self, n):
      self.n = n
      self.batch_size = 5
      self.diag = np.random.uniform(
          0.1, 1, (self.batch_size, self.n)
      ).astype(np.float32)
      non_diag_size = self.n * (self.n - 1) // 2
      self.non_diag = np.random.uniform(
          -1, 1, (self.batch_size, non_diag_size)
      ).astype(np.float32)
      self.gy = np.random.uniform(
          -1, 1, (self.batch_size, self.n, self.n)
      ).astype(np.float32)
  
file_path: pfrl/tests/functions_tests/test_lower_triangular_matrix.py
imports: import numpy
  import pytest
  import torch
  from pfrl.functions.lower_triangular_matrix import lower_triangular_matrix
label_desc: Use image node_id 1 for calling the TestLowerTriangularMatrix obj's underlying member method code with example usage: obj.setUp(n) without return types