code: def test_simple_nulls(self):
      # Infer various kinds of data, with nulls
      rows = (
          b'{"a": 1, "b": 2, "c": null, "d": null, "e": null}\n'
          b'{"a": null, "b": -5, "c": "foo", "d": null, "e": true}\n'
          b'{"a": 4.5, "b": null, "c": "nan", "d": null,"e": false}\n'
      )
      table = self.read_bytes(rows)
      schema = pa.schema(
          [
              ("a", pa.float64()),
              ("b", pa.int64()),
              ("c", pa.string()),
              ("d", pa.null()),
              ("e", pa.bool_()),
          ]
      )
      assert table.schema == schema
      assert table.to_pydict() == {
          "a": [1.0, None, 4.5],
          "b": [2, -5, None],
          "c": [None, "foo", "nan"],
          "d": [None, None, None],
          "e": [None, True, False],
      }
  
imports: from collections import OrderedDict
  from decimal import Decimal
  import io
  import itertools
  import json
  import string
  import unittest
  import numpy
  import pytest
  import pyarrow
  from pyarrow.json import read_json, ReadOptions, ParseOptions
label_desc: Use image node_id 8 for calling the BaseTestJSONRead obj's underlying member method code with example usage: obj.test_simple_nulls() without return types