bpo-31778: Make ast.literal_eval() more strict. #4035
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Addition and subtraction of arbitrary numbers no longer allowed.
dbieber
approved these changes
Nov 9, 2017
This looks good to me. Two test suggestions inline.
I'm the one who filed https://bugs.python.org/issue31778, but I'm not a Python contributor, so presumably someone else needs to review this too.
| right = _convert(node.right) | ||
| if isinstance(left, _NUM_TYPES) and isinstance(right, _NUM_TYPES): | ||
| left = _convert_signed_num(node.left) | ||
| right = _convert_num(node.right) |
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Perhaps it would be useful to add to the test assertRaises(ValueError, ast.literal_eval, '3 + (0 + 2j)') to catch unintended behavior changes to _convert_num in future edits.
| self.assertEqual(ast.literal_eval('-6'), -6) | ||
| self.assertEqual(ast.literal_eval('-6j+3'), 3-6j) | ||
| self.assertEqual(ast.literal_eval('3.25'), 3.25) |
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Perhaps it would also be useful to assertRaises(ValueError for an expression such as 1j+2j or 1+2j+3j.
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Addition and subtraction of arbitrary numbers no longer allowed.
https://bugs.python.org/issue31778