code: def test_explicit_schema_decimal(self):
      rows = b'{"a": 1}\n' b'{"a": 1.45}\n' b'{"a": -23.456}\n' b"{}\n"
      expected = {
          "a": [
              Decimal("1"),
              Decimal("1.45"),
              Decimal("-23.456"),
              None,
          ],
      }
      for type_factory in (pa.decimal128, pa.decimal256):
          schema = pa.schema([("a", type_factory(9, 4))])
          opts = ParseOptions(explicit_schema=schema)
          table = self.read_bytes(rows, parse_options=opts)
          assert table.schema == schema
          assert table.to_pydict() == expected
  
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 12 for calling the BaseTestJSONRead obj's underlying member method code with example usage: obj.test_explicit_schema_decimal() without return types