class_docstr: Deep LR scheduler tests to check how we handle preemption.
class_docstr_tok: ["Deep","LR","scheduler","tests","to","check","how","we","handle","preemption","."]
code: def test_linear(self):
      self._test_scheduler(lr_scheduler="linear")
  
imports: import os
  import unittest
  import torch
  import parlai.nn.lr_scheduler
  import parlai.utils.testing
label_desc: Use image node_id 8 for calling the TestLRIntegration obj's underlying member method code with example usage: obj.test_linear() without return types