code: def init(self, M, N, op_func):
      self.input_one = torch.rand(M, N)
      self.op_func = op_func
  
imports: import operator_benchmark
  import torch
label_desc: Use image node_id 1 for calling the UnaryOpBenchmark obj's underlying member method code with example usage: obj.init(M, N, op_func) without return types