code: def test_LinearDecayScheduler_with_step_num(self):
      scheduler = LinearDecayScheduler(start_value=10, max_steps=10)
      value = scheduler.step(5)
      np.testing.assert_almost_equal(value, 5, 8)
  
      value = scheduler.step(3)
      np.testing.assert_almost_equal(value, 2, 8)
  
file_path: PARL/parl/utils/tests/scheduler_test.py
imports: import unittest
  import numpy
  from parl.utils.scheduler import *
label_desc: Use image node_id 7 for calling the TestScheduler obj's underlying member method code with example usage: obj.test_LinearDecayScheduler_with_step_num() without return types