{
  "type"      : ["str",   "multistep"],
  "batch_size": ["int",   128],
  "epochs"    : ["int",   300],
  "momentum"  : ["float", 0.9],
  "decay"     : ["float", 0.0001],
  "LR"        : ["float", 0.5],
  "milestones": ["int",   [150, 225]],
  "gammas"    : ["float", [0.1, 0.1]]
}