class_docstr: Benchmark learn model selection.
class_docstr_tok: ["Benchmark","learn","model","selection","."]
code: def setup(self):
      self._session = mars.new_session()
  
imports: import mars
  import mars.tensor
  from mars.learn.model_selection import train_test_split
label_desc: Use image node_id 1 for calling the ModelSelectionSuite obj's underlying member method code with example usage: obj.setup() without return types