code: def init(self, M, N, dtype):
      self.data = self.tensor([M, N], dtype)
      self.lambda1 = self.tensor([N], dtype)
      self.lambda2 = self.tensor([N], dtype)
      self.output = self.tensor([1, 1], dtype)
      self.set_module_name("batch_box_cox")
  
file_path: pytorch/benchmarks/operator_benchmark/c2/batch_box_cox_test.py
imports: import benchmark_caffe2
  from benchmark_caffe2 import Caffe2BenchmarkBase
  from caffe2.python import core
  import operator_benchmark
label_desc: Use image node_id 1 for calling the BatchBoxCoxBenchmark obj's underlying member method code with example usage: obj.init(M, N, dtype) without return types