docstr: When len(test_envs) == 2, you can specify target env for computing exact test acc.
docstr_tok: ["When","len","(","test_envs",")","==","2",",","you","can","specify","target","env","for","computing","exact","test","acc","."]
code: def set_target_env(self, target_env):
      """When len(test_envs) == 2, you can specify target env for computing exact test acc."""
      self.test_envs = [target_env]
  
file_path: generalized-moe/domainbed/evaluator.py
imports: import collections
  import torch
  import torch.nn
  import torch.nn.functional
  from domainbed.lib.fast_data_loader import FastDataLoader
label_desc: Use image node_id 2 for calling the Evaluator obj's underlying member method code with example usage: obj.set_target_env(target_env) without return types