code: def __init__(self, lr, momentum, wd):
      super().__init__(wd)
      self.lr = lr
      self.momentum = momentum
      self.v = {}
      self.init_lr = lr
  
file_path: nnabla/python/test/solver/test_sgdw.py
imports: import pytest
  import nnabla.solvers
  import numpy
  from solver_test_utils import solver_tester, RefSolver, MixinWeightDecayFused
  from nbla_test_utils import list_context
label_desc: Use image node_id 1 to create a new RefSgdW object from inherited base classes: MixinWeightDecayFused, RefSolver with example: obj = RefSgdW(lr, momentum, wd)