Replace ast.NameConstant with ast.Constant and remove duplicates

[justinchuby]

This pull request includes several changes to the onnxscript/converter.py and onnxscript/converter_test.py files to improve compatibility with different Python versions and simplify the code. The most important changes include removing deprecated AST node types and updating test cases to reflect these changes.

Compatibility and simplification improvements:

• onnxscript/converter.py: Removed deprecated AST node types ast.Num, ast.Str, and ast.NameConstant from the _is_constant_expr method to streamline the code and ensure compatibility with Python 3.9+ where ast.Constant is used instead.
• onnxscript/converter.py: Simplified the _translate_opt_expr method by removing the check for ast.NameConstant since ast.Constant now covers this case for Python 3.9+.

Test case updates:

• onnxscript/converter_test.py: Updated the test case in the f1 function to replace ast.Name with ast.Constant to align with the changes in the AST node types used.

---

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[codecov]

❌ 4 Tests Failed:

Tests completed	Failed	Passed	Skipped
14109	4	14105	1700

View the top 2 failed test(s) by shortest run time

onnxscript.backend.onnx_export_test.TestOnnxBackEnd::test_export2python_produces_correct_onnx_script_model_0316_test_dequantizelinear_blocked

Stack Traces | 0.004s run time

onnxscript\backend\onnx_export_test.py:137: in extract_functions
    mod = importlib.import_module(import_name)
C:\hostedtoolcache\windows\Python\3.11.9\x64\Lib\importlib\__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
E   ModuleNotFoundError: No module named 'tests.onnx_backend_test_code.test_dequantizelinear_blocked'

The above exception was the direct cause of the following exception:
.nox\test\Lib\site-packages\parameterized\parameterized.py:620: in standalone_func
    return func(*(a + p.args), **p.kwargs, **kw)
onnxscript\backend\onnx_export_test.py:271: in test_export2python_produces_correct_onnx_script_model
    functions = extract_functions(backend_test.name, code, self.test_folder)
onnxscript\backend\onnx_export_test.py:139: in extract_functions
    raise AssertionError(
E   AssertionError: Unable to import 'tests.onnx_backend_test_code.test_dequantizelinear_blocked' (e=No module named 'tests.onnx_backend_test_code.test_dequantizelinear_blocked') (file: 'D:\\a\\onnxscript\\onnxscript\\tests\\onnx_backend_test_code\\test_dequantizelinear_blocked.py', absolute path: 'D:\\a\\onnxscript\\onnxscript\\tests\\onnx_backend_test_code\\test_dequantizelinear_blocked.py', current folder: D:\a\onnxscript\onnxscript
E   ---- CONTENT --
E   import numpy
E   from onnx import TensorProto
E   from onnx.helper import make_tensor
E   from onnxscript import script, external_tensor
E   from onnxscript.values import Opset
E   from onnxscript.onnx_types import FLOAT, UINT8
E   from onnxscript.onnx_opset import opset21
E   
E   @script()
E   def bck_test_dequantizelinear_blocked(x: UINT8[1,4,3,2], x_scale: FLOAT[1,2,3,2], x_zero_point: UINT8[1,2,3,2]) -> (FLOAT[1,4,3,2]):
E       y = opset21.DequantizeLinear(x, x_scale, x_zero_point, axis=1, block_size=2)
E       return y

onnxscript.backend.onnx_export_test.TestOnnxBackEnd::test_export2python_produces_correct_onnx_script_model_0754_test_or4d

Stack Traces | 0.004s run time

onnxscript\backend\onnx_export_test.py:137: in extract_functions
    mod = importlib.import_module(import_name)
C:\hostedtoolcache\windows\Python\3.11.9\x64\Lib\importlib\__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
E   ModuleNotFoundError: No module named 'tests.onnx_backend_test_code.test_or4d'

The above exception was the direct cause of the following exception:
.nox\test\Lib\site-packages\parameterized\parameterized.py:620: in standalone_func
    return func(*(a + p.args), **p.kwargs, **kw)
onnxscript\backend\onnx_export_test.py:271: in test_export2python_produces_correct_onnx_script_model
    functions = extract_functions(backend_test.name, code, self.test_folder)
onnxscript\backend\onnx_export_test.py:139: in extract_functions
    raise AssertionError(
E   AssertionError: Unable to import 'tests.onnx_backend_test_code.test_or4d' (e=No module named 'tests.onnx_backend_test_code.test_or4d') (file: 'D:\\a\\onnxscript\\onnxscript\\tests\\onnx_backend_test_code\\test_or4d.py', absolute path: 'D:\\a\\onnxscript\\onnxscript\\tests\\onnx_backend_test_code\\test_or4d.py', current folder: D:\a\onnxscript\onnxscript
E   ---- CONTENT --
E   import numpy
E   from onnx import TensorProto
E   from onnx.helper import make_tensor
E   from onnxscript import script, external_tensor
E   from onnxscript.values import Opset
E   from onnxscript.onnx_types import BOOL
E   from onnxscript.onnx_opset import opset7
E   
E   @script()
E   def bck_test_or4d(x: BOOL[3,4,5,6], y: BOOL[3,4,5,6]) -> (BOOL[3,4,5,6]):
E       r_or = opset7.Or(x, y)
E       return r_or

View the full list of 1 ❄️ flaky tests

onnxscript.backend.onnx_export_test.TestOnnxBackEnd::test_export2python_produces_correct_onnx_script_model_0732_test_nonmaxsuppression_two_classes

Flake rate in main: 8.70% (Passed 21 times, Failed 2 times)

Stack Traces | 0.004s run time

onnxscript\backend\onnx_export_test.py:137: in extract_functions
    mod = importlib.import_module(import_name)
C:\hostedtoolcache\windows\Python\3.11.9\x64\Lib\importlib\__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
E   ModuleNotFoundError: No module named 'tests.onnx_backend_test_code.test_nonmaxsuppression_two_classes'

The above exception was the direct cause of the following exception:
.nox\test\Lib\site-packages\parameterized\parameterized.py:620: in standalone_func
    return func(*(a + p.args), **p.kwargs, **kw)
onnxscript\backend\onnx_export_test.py:271: in test_export2python_produces_correct_onnx_script_model
    functions = extract_functions(backend_test.name, code, self.test_folder)
onnxscript\backend\onnx_export_test.py:139: in extract_functions
    raise AssertionError(
E   AssertionError: Unable to import 'tests.onnx_backend_test_code.test_nonmaxsuppression_two_classes' (e=No module named 'tests.onnx_backend_test_code.test_nonmaxsuppression_two_classes') (file: 'D:\\a\\onnxscript\\onnxscript\\tests\\onnx_backend_test_code\\test_nonmaxsuppression_two_classes.py', absolute path: 'D:\\a\\onnxscript\\onnxscript\\tests\\onnx_backend_test_code\\test_nonmaxsuppression_two_classes.py', current folder: D:\a\onnxscript\onnxscript
E   ---- CONTENT --
E   import numpy
E   from onnx import TensorProto
E   from onnx.helper import make_tensor
E   from onnxscript import script, external_tensor
E   from onnxscript.values import Opset
E   from onnxscript.onnx_types import FLOAT, INT64
E   from onnxscript.onnx_opset import opset11
E   
E   @script()
E   def bck_test_nonmaxsuppression_two_classes(boxes: FLOAT[1,6,4], scores: FLOAT[1,2,6], max_output_boxes_per_class: INT64[1], iou_threshold: FLOAT[1], score_threshold: FLOAT[1]) -> (INT64[4,3]):
E       selected_indices = opset11.NonMaxSuppression(boxes, scores, max_output_boxes_per_class, iou_threshold, score_threshold)
E       return selected_indices

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