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* bpo-42246: Don't eliminate jumps to jumps, if it will break PEP 626. (GH-23896)Mark Shannon2020-12-231-765/+766
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* bpo-42634: Mark reraise after except blocks as artificial. (GH-23877)Mark Shannon2020-12-211-1726/+1729
| | | | | | | * Mark reraise after except blocks as artificial. * Update importlib * Update dis test.
* bpo-42246: Make sure that `f_lasti`, and thus `f_lineno`, is set correctly ↵Mark Shannon2020-12-171-43/+43
| | | | | | | | | after raising or reraising an exception (GH-23803) * Ensure that f_lasti is set correctly after an exception is raised to conform to PEP 626. * Update importlib * Add NEWS.
* bpo-42645: Make sure that return/break/continue are only traced once when ↵Mark Shannon2020-12-161-1660/+1660
| | | | | | | | | exiting via a finally block. (GH-23780) * Make sure that return/break/continue are only traced once when exiting via a finally block. * Add test for return in try-finally. * Update importlib
* bpo-42615: Delete redundant jump instructions that only bypass empty blocks ↵Om G2020-12-161-101/+101
| | | | | | | | | | | | | | | | | | | | | | | (GH-23733) * Delete jump instructions that bypass empty blocks * Add news entry * Explicitly check for unconditional jump opcodes Using the is_jump function results in the inclusion of instructions like returns for which this optimization is not really valid. So, instead explicitly check that the instruction is an unconditional jump. * Handle conditional jumps, delete jumps gracefully * Ensure b_nofallthrough and b_reachable are valid * Add test for redundant jumps * Regenerate importlib.h and edit Misc/ACKS * Fix bad whitespace
* bpo-42246: Remove DO_NOT_EMIT_BYTECODE macros, so that while loops and if ↵Mark Shannon2020-12-151-1704/+1705
| | | | statements conform to PEP 626. (GH-23743)
* bpo-42635: Mark JUMP_ABSOLUTE at end of 'for' loop as artificial to avoid ↵Mark Shannon2020-12-141-1756/+1756
| | | | spurious line events. (GH-23761)
* Don't generate spurious line number in try-except-finally. (#23760)Mark Shannon2020-12-141-1489/+1489
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* bpo-26131: Deprecate usage of load_module() (GH-23469)Brett Cannon2020-12-041-1779/+1811
| | | Raise an ImportWarning when the import system falls back on load_module(). As for implementations of load_module(), raise a DeprecationWarning.
* bpo-42246: Don't forget the entry block when ensuring that all exits have a ↵Mark Shannon2020-12-041-1/+1
| | | | | line number (GH-23636) Don't forget the entry block when ensuring that all exits have a line number.
* bpo-42246: Make sure that line number is correct after a return, as required ↵Mark Shannon2020-12-021-1439/+1436
| | | | | by PEP 626 (GH-23495) Make sure that line number is correct after a return, as defined by PEP 626.
* bpo-42403: Use @staticmethod in importlib (GH-23395)Victor Stinner2020-11-201-709/+708
| | | | | | | | | | | | | Use @staticmethod on methods using @classmethod but don't use their cls parameter on the following classes: * BuiltinImporter * FrozenImporter * WindowsRegistryFinder * PathFinder Leave methods using @_requires_builtin or @_requires_frozen unchanged, since this decorator requires the wrapped method to have an extra parameter (cls or self).
* bpo-42403: Simplify importlib external bootstrap (GH-23397)Victor Stinner2020-11-191-1806/+1808
| | | | | | | Simplify the importlib external bootstrap code: importlib._bootstrap_external now uses regular imports to import builtin modules. When it is imported, the builtin __import__() function is already fully working and so can be used to import builtin modules like sys.
* bpo-42349: Compiler clean up. More yak-shaving for PEP 626. (GH-23267)Mark Shannon2020-11-171-1412/+1413
| | | Make sure that CFG from compiler front-end is correct. Be a bit more aggressive in the compiler back-end.
* bpo-42246: Eliminate jumps to exit blocks by copying those blocks. (#23251)Mark Shannon2020-11-121-1410/+1410
| | | * Compiler: eliminate jumps to short exit blocks by copying.
* bpo-42246: Partial implementation of PEP 626. (GH-23113)Mark Shannon2020-11-121-1518/+1533
| | | * Implement new line number table format, as defined in PEP 626.
* bpo-41323: Perform 'peephole' optimizations directly on the CFG. (GH-21517)Mark Shannon2020-07-301-1102/+1098
| | | * Move 'peephole' optimizations into compile.c and perform them directly on the CFG.
* bpo-41076: Pre-feed the parser with the f-string expression location (GH-21054)Lysandros Nikolaou2020-06-271-214/+214
| | | This commit changes the parsing of f-string expressions with the new parser. The parser gets pre-fed with the location of the expression itself (not the f-string, which was what we were doing before). This allows us to completely skip the shifting of the AST nodes after the parsing is completed.
* bpo-40334: PEP 617 implementation: New PEG parser for CPython (GH-19503)Pablo Galindo2020-04-221-44/+45
| | | | Co-authored-by: Guido van Rossum <guido@python.org> Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
* bpo-39987: Simplify setting lineno in the compiler. (GH-19037)Serhiy Storchaka2020-03-171-1621/+1620
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* bpo-38091: Import deadlock detection causes deadlock (GH-17518)Armin Rigo2020-03-031-1667/+1670
| | | Automerge-Triggered-By: @brettcannon
* bpo-39320: Handle unpacking of **values in compiler (GH-18141)Mark Shannon2020-01-271-1421/+1421
| | | | | | | | | | | | | * Add DICT_UPDATE and DICT_MERGE bytecodes. Use them for ** unpacking. * Remove BUILD_MAP_UNPACK and BUILD_MAP_UNPACK_WITH_CALL, as they are now unused. * Update magic number for ** unpacking opcodes. * Update dis.rst to incorporate new bytecodes. * Add blurb entry.
* bpo-39336: Allow packages to not let their child modules be set on them (#18006)Dino Viehland2020-01-231-337/+346
| | | | | * bpo-39336: Allow setattr to fail on modules which aren't assignable When attaching a child module to a package if the object in sys.modules raises an AttributeError (e.g. because it is immutable) it causes the whole import to fail. This now allows immutable packages to exist and an ImportWarning is reported and the AttributeError exception is ignored.
* bpo-39156: Break up COMPARE_OP into four logically distinct opcodes. (GH-17754)Mark Shannon2020-01-141-1463/+1459
| | | | | | | | Break up COMPARE_OP into four logically distinct opcodes: * COMPARE_OP for rich comparisons * IS_OP for 'is' and 'is not' tests * CONTAINS_OP for 'in' and 'is not' tests * JUMP_IF_NOT_EXC_MATCH for checking exceptions in 'try-except' statements.
* Fix handling of line numbers around finally-blocks. (#17737)Mark Shannon2019-12-301-1622/+1622
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* Produce cleaner bytecode for 'with' and 'async with' by generating separate ↵Mark Shannon2019-11-211-1076/+1089
| | | | | | code for normal and exceptional paths. (#6641) Remove BEGIN_FINALLY, END_FINALLY, CALL_FINALLY and POP_FINALLY bytecodes. Implement finally blocks by code duplication. Reimplement frame.lineno setter using line numbers rather than bytecode offsets.
* bpo-35923: Update the BuiltinImporter to use loader._ORIGIN instead of a ↵Dong-hee Na2019-09-111-754/+755
| | | | | | hard-coded value (GH-15651)
* bpo-34880: Add the LOAD_ASSERTION_ERROR opcode. (GH-15073)Zackery Spytz2019-08-251-318/+317
| | | | Fix assert statement misbehavior if AssertionError is shadowed.
* bpo-37830: Fix compilation of break and continue in finally. (GH-15320)Serhiy Storchaka2019-08-241-42/+42
| | | | | | Fix compilation of "break" and "continue" in the "finally" block when the corresponding "try" block contains "return" with a non-constant value.
* bpo-37685: Fixed __eq__, __lt__ etc implementations in some classes. (GH-14952)Serhiy Storchaka2019-08-081-1102/+1104
| | | | They now return NotImplemented for unsupported type of the other operand.
* bpo-37444: Update differing exception between builtins and importlib (GH-14869)Ngalim Siregar2019-08-031-96/+96
| | | | | | | | | | Imports now raise `TypeError` instead of `ValueError` for relative import failures. This makes things consistent between `builtins.__import__` and `importlib.__import__` as well as using a more natural import for the failure. https://bugs.python.org/issue37444 Automerge-Triggered-By: @brettcannon
* bpo-37213: Handle negative line deltas correctly in the peephole optimizer ↵Pablo Galindo2019-06-131-1107/+1106
| | | | | (GH-13969) The peephole optimizer was not optimizing correctly bytecode after negative deltas were introduced. This is due to the fact that some special values (255) were being searched for in both instruction pointer delta and line number deltas.
* bpo-36829: Add sys.unraisablehook() (GH-13187)Victor Stinner2019-05-221-60/+60
| | | | | | | | | | | | | | | | | | | Add new sys.unraisablehook() function which can be overridden to control how "unraisable exceptions" are handled. It is called when an exception has occurred but there is no way for Python to handle it. For example, when a destructor raises an exception or during garbage collection (gc.collect()). Changes: * Add an internal UnraisableHookArgs type used to pass arguments to sys.unraisablehook. * Add _PyErr_WriteUnraisableDefaultHook(). * The default hook now ignores exception on writing the traceback. * test_sys now uses unittest.main() to automatically discover tests: remove test_main(). * Add _PyErr_Init(). * Fix PyErr_WriteUnraisable(): hold a strong reference to sys.stderr while using it
* bpo-36540: PEP 570 -- Implementation (GH-12701)Pablo Galindo2019-04-291-1380/+1401
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit contains the implementation of PEP570: Python positional-only parameters. * Update Grammar/Grammar with new typedarglist and varargslist * Regenerate grammar files * Update and regenerate AST related files * Update code object * Update marshal.c * Update compiler and symtable * Regenerate importlib files * Update callable objects * Implement positional-only args logic in ceval.c * Regenerate frozen data * Update standard library to account for positional-only args * Add test file for positional-only args * Update other test files to account for positional-only args * Add News entry * Update inspect module and related tests
* bpo-35321: Set the spec origin to frozen in frozen modules (#11732)Nina Zakharenko2019-02-051-656/+657
| | | | | | | | | | * bpo-35321: Set the spec origin to frozen in frozen modules This fix correctly sets the spec origin to "frozen" for the _frozen_importlib module. Note that the origin was already correctly set in _frozen_importlib_external. * 📜🤖 Added by blurb_it.
* bpo-16806: Fix `lineno` and `col_offset` for multi-line string tokens (GH-10021)Anthony Sottile2019-01-131-8/+8
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* bpo-34100: Merge constants recursively (GH-8341)INADA Naoki2018-11-261-1506/+1479
| | | | | | | There are some same consts in a module. This commit merges them into single instance. It reduces number of objects in memory after loading modules. https://bugs.python.org/issue34100
* bpo-34876: Change the lineno of the AST for decorated function and class. ↵Serhiy Storchaka2018-10-301-1050/+1051
| | | | | | | (GH-9731) It was overridden by the lineno of the first decorator. Now it is the lineno of 'def' or 'class'.
* bpo-33331: Clean modules in the reversed order in PyImport_Cleanup(). (GH-6565)Serhiy Storchaka2018-10-291-1786/+1746
| | | | | | Modules imported last are now cleared first at interpreter shutdown. A newly imported module is moved to the end of sys.modules, behind modules on which it depends.
* bpo-25711: Rewrite zipimport in pure Python. (GH-6809)Serhiy Storchaka2018-09-181-1/+1
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* bpo-12458: Fix line numbers for multiline expressions. (GH-8774)Serhiy Storchaka2018-09-171-1093/+1098
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* bpo-32911: Revert bpo-29463. (GH-7121) (GH-7197)Serhiy Storchaka2018-05-291-1601/+1602
| | | | | | Remove the docstring attribute of AST types and restore docstring expression as a first stmt in their body. Co-authored-by: INADA Naoki <methane@users.noreply.github.com>
* bpo-33270: Intern names for all anonymous code objects (#6472)Zackery Spytz2018-04-151-1/+1
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* bpo-32946: Speed up "from ... import ..." from non-packages. (GH-5873)Serhiy Storchaka2018-03-111-258/+258
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* bpo-17611. Move unwinding of stack for "pseudo exceptions" from interpreter ↵Serhiy Storchaka2018-02-221-1648/+1653
| | | | | | | | | to compiler. (GH-5006) Co-authored-by: Mark Shannon <mark@hotpy.org> Co-authored-by: Antoine Pitrou <antoine@python.org>
* bpo-32303 - Consistency fixes for namespace loaders (#5481)Barry Warsaw2018-02-021-944/+945
| | | | | | | * Make sure ``__spec__.loader`` matches ``__loader__`` for namespace packages. * Make sure ``__spec__.origin` matches ``__file__`` for namespace packages. https://bugs.python.org/issue32303 https://bugs.python.org/issue32305
* bpo-24340: Fix estimation of the code stack size. (#5076)Serhiy Storchaka2018-01-091-21/+21
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* bpo-29469: Optimize literal lists and sets iterating on the AST level. (#4866)Serhiy Storchaka2017-12-141-1743/+1742
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* bpo-29469: Move constant folding to AST optimizer (GH-2858)INADA Naoki2017-12-141-1778/+1777
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* bpo-21720: Restore the Python 2.7 logic in handling a fromlist. (#4118)Serhiy Storchaka2017-10-261-1773/+1783
| | | | | | BytesWarning no longer emitted when the fromlist argument of __import__() or the __all__ attribute of the module contain bytes instances.
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