code: def setUp(self):
      self.reader = ReaderMock(
          TestSchema, schema_data_generator_example
      )
  
file_path: petastorm/petastorm/tests/test_reader_mock.py
imports: import unittest
  from decimal import Decimal
  import pytest
  import tensorflow.compat.v1
  from petastorm.test_util.reader_mock import ReaderMock, schema_data_generator_example
  from petastorm.tests.test_end_to_end import TestSchema
  from petastorm.tf_utils import tf_tensors, _numpy_to_tf_dtypes
  from petastorm.tests.test_tf_utils import create_tf_graph
label_desc: Use image node_id 1 for calling the ReaderMockTest obj's underlying member method code with example usage: obj.setUp() without return types