[export] fix sympy.expr roundtrippability for serialization#141284
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[export] fix sympy.expr roundtrippability for serialization#141284
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🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/141284
Note: Links to docs will display an error until the docs builds have been completed. ❗ 1 Active SEVsThere are 1 currently active SEVs. If your PR is affected, please view them below: ✅ You can merge normally! (3 Unrelated Failures)As of commit b5bff55 with merge base 0155a11 ( BROKEN TRUNK - The following jobs failed but were present on the merge base:👉 Rebase onto the `viable/strict` branch to avoid these failures
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This pull request was exported from Phabricator. Differential Revision: D66283208 |
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zhxchen17
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Summary: Latest attempt after [136802](#136802) and [140084](#140084) got shelved. This keeps the string format for `expr_str`, but calls `sympy.printing.repr.srepr(s)` instead of `str(s)`, which prints expressions more explicitly, e.g. ``` ((2*x)//(3*y + 4)) -> "FloorDiv(Mul(Integer(2), Symbol('x')), Add(Mul(Integer(3), Symbol('y')), Integer(4)))" ``` This is nice because: - we have better roundtrippability for deserialization, robust to pretty printing changes like [this](https://github.com/pytorch/pytorch/blob/6c9bfd52b6a76ddff053bcff4d23ea7f4c280e9a/torch/utils/_sympy/functions.py#L208) that caused the issue in the first place. - this preserves the BC surface for both 1) sigmoid thrift serialization, by keeping the string format, and 2) deserialization for old IRs, since `sympy.sympify(...)` still handles the old `str(s)` format. - more memory efficient than storing ASTs; the [AST attempt](#140084) increased artifact size by 20% on some toy programs. - doesn't even require a schema version bump. Additionally to push some test cases over the line, this redoes expression processing (handling ranges, symbol caching) by doing bottom-up processing instead of the current hacky-ish workflow. Test Plan: test_serdes, test_serialize, internal tests broken by AST PR Reviewed By: zhxchen17 Differential Revision: D66283208
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This was referenced Nov 22, 2024
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…141284) Summary: Latest attempt after [136802](pytorch#136802) and [140084](pytorch#140084) got shelved. This keeps the string format for `expr_str`, but calls `sympy.printing.repr.srepr(s)` instead of `str(s)`, which prints expressions more explicitly, e.g. ``` ((2*x)//(3*y + 4)) -> "FloorDiv(Mul(Integer(2), Symbol('x')), Add(Mul(Integer(3), Symbol('y')), Integer(4)))" ``` This is nice because: - we have better roundtrippability for deserialization, robust to pretty printing changes like [this](https://github.com/pytorch/pytorch/blob/6c9bfd52b6a76ddff053bcff4d23ea7f4c280e9a/torch/utils/_sympy/functions.py#L208) that caused the issue in the first place. - this preserves the BC surface for both 1) sigmoid thrift serialization, by keeping the string format, and 2) deserialization for old IRs, since `sympy.sympify(...)` still handles the old `str(s)` format. - more memory efficient than storing ASTs; the [AST attempt](pytorch#140084) increased artifact size by 20% on some toy programs. - doesn't even require a schema version bump. Additionally to push some test cases over the line, this redoes expression processing (handling ranges, symbol caching) by doing bottom-up processing instead of the current hacky-ish workflow. Test Plan: test_serdes, test_serialize, internal tests broken by AST PR Differential Revision: D66283208 Pull Request resolved: pytorch#141284 Approved by: https://github.com/zhxchen17
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Summary:
Latest attempt after 136802 and 140084 got shelved.
This keeps the string format for
expr_str, but callssympy.printing.repr.srepr(s)instead ofstr(s), which prints expressions more explicitly, e.g.This is nice because:
sympy.sympify(...)still handles the oldstr(s)format.Additionally to push some test cases over the line, this redoes expression processing (handling ranges, symbol caching) by doing bottom-up processing instead of the current hacky-ish workflow.
Test Plan: test_serdes, test_serialize, internal tests broken by AST PR
Differential Revision: D66283208