code: def testStructGet(self):
      net = core.Net("test_net")
      s1 = schema.NewRecord(net, schema.Scalar(np.float32))
      s2 = schema.NewRecord(net, schema.Scalar(np.float32))
      t = schema.Tuple(s1, s2)
      assert t.get("field_0", None) == s1
      assert t.get("field_1", None) == s2
      assert t.get("field_2", None) is None
  
imports: from caffe2.python import core, schema
  import numpy
  import unittest
  import pickle
  import random
label_desc: Use image node_id 25 for calling the TestDB obj's underlying member method code with example usage: obj.testStructGet() without return types