code: def setUp(self):
      self.x = numpy.random.uniform(1.0, 10.0, self.shape).astype(
          self.dtype
      )
      self.n = numpy.random.randint(3, size=self.shape).astype(
          numpy.int32
      )
      self.func = F.polygamma
  
file_path: chainer/tests/chainer_tests/functions_tests/math_tests/test_polygamma.py
imports: import unittest
  import numpy
  import chainer
  import chainer.functions
  from chainer import testing
label_desc: Use image node_id 1 for calling the TestPolyGammaExceptions obj's underlying member method code with example usage: obj.setUp() without return types