code: def generate_inputs(self):
      x = numpy.random.uniform(-1, 1, self.shape).astype(self.dtype)
      return (x,)
  
imports: import unittest
  import numpy
  import chainer
  from chainer import functions
  from chainer import testing
  from chainer import utils
label_desc: Use image node_id 1 for calling the TestArgMinMax obj's underlying member method code with example usage: obj.generate_inputs() and returns: x