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* bpo-43822: Improve syntax errors for missing commas (GH-25377)Pablo Galindo2021-04-151-5/+6
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* bpo-35975: Support parsing earlier minor versions of Python 3 (GH-12086)Guido van Rossum2019-03-071-7/+9
| | | | | | | This adds a `feature_version` flag to `ast.parse()` (documented) and `compile()` (hidden) that allow tweaking the parser to support older versions of the grammar. In particular if `feature_version` is 5 or 6, the hacks for the `async` and `await` keyword from PEP 492 are reinstated. (For 7 or higher, these are unconditionally treated as keywords, but they are still special tokens rather than `NAME` tokens that the parser driver recognizes.) https://bugs.python.org/issue35975
* bpo-35766: Merge typed_ast back into CPython (GH-11645)Guido van Rossum2019-01-311-5/+7
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* bpo-35224: PEP 572 Implementation (#10497)Emily Morehouse2019-01-241-6/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Add tokenization of := - Add token to Include/token.h. Add token to documentation in Doc/library/token.rst. - Run `./python Lib/token.py` to regenerate Lib/token.py. - Update Parser/tokenizer.c: add case to handle `:=`. * Add initial usage of := in grammar. * Update Python.asdl to match the grammar updates. Regenerated Include/Python-ast.h and Python/Python-ast.c * Update AST and compiler files in Python/ast.c and Python/compile.c. Basic functionality, this isn't scoped properly * Regenerate Lib/symbol.py using `./python Lib/symbol.py` * Tests - Fix failing tests in test_parser.py due to changes in token numbers for internal representation * Tests - Add simple test for := token * Tests - Add simple tests for named expressions using expr and suite * Tests - Update number of levels for nested expressions to prevent stack overflow * Update symbol table to handle NamedExpr * Update Grammar to allow assignment expressions in if statements. Regenerate Python/graminit.c accordingly using `make regen-grammar` * Tests - Add additional tests for named expressions in RoundtripLegalSyntaxTestCase, based on examples and information directly from PEP 572 Note: failing tests are currently commented out (4 out of 24 tests currently fail) * Tests - Add temporary syntax test failure tests in test_parser.py Note: There is an outstanding TODO for this -- syntax tests need to be moved to a different file (presumably test_syntax.py), but this is covering what needs to be tested at the moment, and it's more convenient to run a single test for the time being * Add support for allowing assignment expressions as function argument annotations. Uncomment tests for these cases because they all pass now! * Tests - Move existing syntax tests out of test_parser.py and into test_named_expressions.py. Refactor syntax tests to use unittest * Add TargetScopeError exception to extend SyntaxError Note: This simply creates the TargetScopeError exception, it is not yet used anywhere * Tests - Update tests per PEP 572 Continue refactoring test suite: The named expression test suite now checks for any invalid cases that throw exceptions (no longer limited to SyntaxErrors), assignment tests to ensure that variables are properly assigned, and scope tests to ensure that variable availability and values are correct Note: - There are still tests that are marked to skip, as they are not yet implemented - There are approximately 300 lines of the PEP that have not yet been addressed, though these may be deferred * Documentation - Small updates to XXX/todo comments - Remove XXX from child description in ast.c - Add comment with number of previously supported nested expressions for 3.7.X in test_parser.py * Fix assert in seq_for_testlist() * Cleanup - Denote "Not implemented -- No keyword args" on failing test case. Fix PEP8 error for blank lines at beginning of test classes in test_parser.py * Tests - Wrap all file opens in `with...as` to ensure files are closed * WIP: handle f(a := 1) * Tests and Cleanup - No longer skips keyword arg test. Keyword arg test now uses a simpler test case and does not rely on an external file. Remove print statements from ast.c * Tests - Refactor last remaining test case that relied on on external file to use a simpler test case without the dependency * Tests - Add better description of remaning skipped tests. Add test checking scope when using assignment expression in a function argument * Tests - Add test for nested comprehension, testing value and scope. Fix variable name in skipped comprehension scope test * Handle restriction of LHS for named expressions - can only assign to LHS of type NAME. Specifically, restrict assignment to tuples This adds an alternative set_context specifically for named expressions, set_namedexpr_context. Thus, context is now set differently for standard assignment versus assignment for named expressions in order to handle restrictions. * Tests - Update negative test case for assigning to lambda to match new error message. Add negative test case for assigning to tuple * Tests - Reorder test cases to group invalid syntax cases and named assignment target errors * Tests - Update test case for named expression in function argument - check that result and variable are set correctly * Todo - Add todo for TargetScopeError based on Guido's comment (https://github.com/python/cpython/commit/2b3acd37bdfc2d35e5094228c6684050d2aa8b0a#r30472562) * Tests - Add named expression tests for assignment operator in function arguments Note: One of two tests are skipped, as function arguments are currently treating an assignment expression inside of parenthesis as one child, which does not properly catch the named expression, nor does it count arguments properly * Add NamedStore to expr_context. Regenerate related code with `make regen-ast` * Add usage of NamedStore to ast_for_named_expr in ast.c. Update occurances of checking for Store to also handle NamedStore where appropriate * Add ste_comprehension to _symtable_entry to track if the namespace is a comprehension. Initialize ste_comprehension to 0. Set set_comprehension to 1 in symtable_handle_comprehension * s/symtable_add_def/symtable_add_def_helper. Add symtable_add_def to handle grabbing st->st_cur and passing it to symtable_add_def_helper. This now allows us to call the original code from symtable_add_def by instead calling symtable_add_def_helper with a different ste. * Refactor symtable_record_directive to take lineno and col_offset as arguments instead of stmt_ty. This allows symtable_record_directive to be used for stmt_ty and expr_ty * Handle elevating scope for named expressions in comprehensions. * Handle error for usage of named expression inside a class block * Tests - No longer skip scope tests. Add additional scope tests * Cleanup - Update error message for named expression within a comprehension within a class. Update comments. Add assert for symtable_extend_namedexpr_scope to validate that we always find at least a ModuleScope if we don't find a Class or FunctionScope * Cleanup - Add missing case for NamedStore in expr_context_name. Remove unused var in set_namedexpr_content * Refactor - Consolidate set_context and set_namedexpr_context to reduce duplicated code. Special cases for named expressions are handled by checking if ctx is NamedStore * Cleanup - Add additional use cases for ast_for_namedexpr in usage comment. Fix multiple blank lines in test_named_expressions * Tests - Remove unnecessary test case. Renumber test case function names * Remove TargetScopeError for now. Will add back if needed * Cleanup - Small comment nit for consistency * Handle positional argument check with named expression * Add TargetScopeError exception definition. Add documentation for TargetScopeError in c-api docs. Throw TargetScopeError instead of SyntaxError when using a named expression in a comprehension within a class scope * Increase stack size for parser by 200. This is a minimal change (approx. 5kb) and should not have an impact on any systems. Update parser test to allow 99 nested levels again * Add TargetScopeError to exception_hierarchy.txt for test_baseexception.py_ * Tests - Major update for named expression tests, both in test_named_expressions and test_parser - Add test for TargetScopeError - Add tests for named expressions in comprehension scope and edge cases - Add tests for named expressions in function arguments (declarations and call sites) - Reorganize tests to group them more logically * Cleanup - Remove unnecessary comment * Cleanup - Comment nitpicks * Explicitly disallow assignment expressions to a name inside parentheses, e.g.: ((x) := 0) - Add check for LHS types to detect a parenthesis then a name (see note) - Add test for this scenario - Update tests for changed error message for named assignment to a tuple (also, see note) Note: This caused issues with the previous error handling for named assignment to a LHS that contained an expression, such as a tuple. Thus, the check for the LHS of a named expression must be changed to be more specific if we wish to maintain the previous error messages * Cleanup - Wrap lines more strictly in test file * Revert "Explicitly disallow assignment expressions to a name inside parentheses, e.g.: ((x) := 0)" This reverts commit f1531400ca7d7a2d148830c8ac703f041740896d. * Add NEWS.d entry * Tests - Fix error in test_pickle.test_exceptions by adding TargetScopeError to list of exceptions * Tests - Update error message tests to reflect improved messaging convention (s/can't/cannot) * Remove cases that cannot be reached in compile.c. Small linting update. * Update Grammar/Tokens to add COLONEQUAL. Regenerate all files * Update TargetScopeError PRE_INIT and POST_INIT, as this was purposefully left out when fixing rebase conflicts * Add NamedStore back and regenerate files * Pass along line number and end col info for named expression * Simplify News entry * Fix compiler warning and explicity mark fallthrough
* bpo-30455: Generate all token related code and docs from Grammar/Tokens. ↵Serhiy Storchaka2018-12-221-82/+52
| | | | | | | | | | | | | | | | | | | (GH-10370) "Include/token.h", "Lib/token.py" (containing now some data moved from "Lib/tokenize.py") and new files "Parser/token.c" (containing the code moved from "Parser/tokenizer.c") and "Doc/library/token-list.inc" (included in "Doc/library/token.rst") are now generated from "Grammar/Tokens" by "Tools/scripts/generate_token.py". The script overwrites files only if needed and can be used on the read-only sources tree. "Lib/symbol.py" is now generated by "Tools/scripts/generate_symbol_py.py" instead of been executable itself. Added new make targets "regen-token" and "regen-symbol" which are now dependencies of "regen-all". The documentation contains now strings for operators and punctuation tokens.
* bpo-33260: Regenerate token.py after removing ASYNC and AWAIT. (GH-6447)Serhiy Storchaka2018-04-111-7/+5
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* bpo-25324: copy tok_name before changing it (#1608)Albert-Jan Nijburg2017-05-311-5/+24
| | | | | | | | | | | | | | | | | | | | | | | | * add test to check if were modifying token * copy list so import tokenize doesnt have side effects on token * shorten line * add tokenize tokens to token.h to get them to show up in token * move ERRORTOKEN back to its previous location, and fix nitpick * copy comments from token.h automatically * fix whitespace and make more pythonic * change to fix comments from @haypo * update token.rst and Misc/NEWS * change wording * some more wording changes
* PEP 0492 -- Coroutines with async and await syntax. Issue #24017.Yury Selivanov2015-05-121-2/+4
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* Issue #22831: Use "with" to avoid possible fd leaks.Serhiy Storchaka2015-04-041-6/+6
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* PEP 465: a dedicated infix operator for matrix multiplication (closes #21176)Benjamin Peterson2014-04-101-5/+6
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* Issue #19936: Added executable bits or shebang lines to Python scripts whichSerhiy Storchaka2014-01-161-0/+0
|\ | | | | | | | | | | | | requires them. Disable executable bits and shebang lines in test and benchmark files in order to prevent using a random system python, and in source files of modules which don't provide command line interface. Fixed shebang lines in the unittestgui and checkpip scripts.
| * Issue #19936: Added executable bits or shebang lines to Python scripts whichSerhiy Storchaka2014-01-161-0/+0
| | | | | | | | | | | | | | requires them. Disable executable bits and shebang lines in test and benchmark files in order to prevent using a random system python, and in source files of modules which don't provide command line interface. Fixed shebang line to use python3 executable in the unittestgui script.
* | Replace IOError with OSError (#16715)Andrew Svetlov2012-12-251-3/+3
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* Issue #9260: A finer-grained import lock.Antoine Pitrou2012-05-171-1/+1
| | | | | Most of the import sequence now uses per-module locks rather than the global import lock, eliminating well-known issues with threads and imports.
* Issue #13629: Renumber the tokens in token.h to match the ↵Meador Inge2012-01-161-30/+30
| | | | _PyParser_TokenNames indexes.
* Fix instructions on how to rebuild some modulesÉric Araujo2011-11-291-1/+1
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* Issue #10386: Added __all__ to token module; this simplifies importingAlexander Belopolsky2010-11-111-10/+8
| | | | | in tokenize module and prevents leaking of private names through import *.
* convert shebang lines: python -> python3Benjamin Peterson2010-03-111-1/+1
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* Merged revisions ↵Christian Heimes2008-02-261-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 61038,61042-61045,61047,61050,61053,61055-61056,61061-61064,61066-61080 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r61063 | andrew.kuchling | 2008-02-25 17:29:19 +0100 (Mon, 25 Feb 2008) | 1 line Move .setupterm() output so that we don't try to call endwin() if it fails ........ r61064 | andrew.kuchling | 2008-02-25 17:29:58 +0100 (Mon, 25 Feb 2008) | 1 line Use file descriptor for real stdout ........ r61067 | facundo.batista | 2008-02-25 19:06:00 +0100 (Mon, 25 Feb 2008) | 4 lines Issue 2117. Update compiler module to handle class decorators. Thanks Thomas Herve ........ r61069 | georg.brandl | 2008-02-25 21:17:56 +0100 (Mon, 25 Feb 2008) | 2 lines Rename sphinx.addons to sphinx.ext. ........ r61071 | georg.brandl | 2008-02-25 21:20:45 +0100 (Mon, 25 Feb 2008) | 2 lines Revert r61029. ........ r61072 | facundo.batista | 2008-02-25 23:33:55 +0100 (Mon, 25 Feb 2008) | 4 lines Issue 2168. gdbm and dbm needs to be iterable; this fixes a failure in the shelve module. Thanks Thomas Herve. ........ r61073 | raymond.hettinger | 2008-02-25 23:42:32 +0100 (Mon, 25 Feb 2008) | 1 line Make sure the itertools filter functions give the same performance for func=bool as func=None. ........ r61074 | raymond.hettinger | 2008-02-26 00:17:41 +0100 (Tue, 26 Feb 2008) | 1 line Revert part of r60927 which made invalid assumptions about the API offered by db modules. ........ r61075 | facundo.batista | 2008-02-26 00:46:02 +0100 (Tue, 26 Feb 2008) | 3 lines Coerced PyBool_Type to be able to compare it. ........ r61076 | raymond.hettinger | 2008-02-26 03:46:54 +0100 (Tue, 26 Feb 2008) | 1 line Docs for itertools.combinations(). Implementation in forthcoming checkin. ........ r61077 | neal.norwitz | 2008-02-26 05:50:37 +0100 (Tue, 26 Feb 2008) | 3 lines Don't use a hard coded port. This test could hang/fail if the port is in use. Speed this test up by avoiding a sleep and using the event. ........ r61078 | neal.norwitz | 2008-02-26 06:12:50 +0100 (Tue, 26 Feb 2008) | 1 line Whitespace normalization ........ r61079 | neal.norwitz | 2008-02-26 06:23:51 +0100 (Tue, 26 Feb 2008) | 1 line Whitespace normalization ........ r61080 | georg.brandl | 2008-02-26 07:40:10 +0100 (Tue, 26 Feb 2008) | 2 lines Banish tab. ........
* Make ELLIPSIS a separate token. This makes it a syntax error to write ". . ↵Georg Brandl2007-03-181-3/+4
| | | | ." for Ellipsis.
* Use better idiom to sort keys.Guido van Rossum2007-02-261-2/+1
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* Fix token.py main code vs. dict views.Georg Brandl2007-02-261-1/+1
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* - PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;Guido van Rossum2007-02-111-1/+1
| | | | | | | | | | and .keys(), .items(), .values() return dict views. The dict views aren't fully functional yet; in particular, they can't be compared to sets yet. but they are useful as "iterator wells". There are still 27 failing unit tests; I expect that many of these have fairly trivial fixes, but there are so many, I could use help.
* SF patch 1631942 by Collin Winter:Guido van Rossum2007-01-101-3/+3
| | | | | | (a) "except E, V" -> "except E as V" (b) V is now limited to a simple name (local variable) (c) V is now deleted at the end of the except block
* PEP 3107 - Function Annotations thanks to Tony LowndsNeal Norwitz2006-12-281-3/+4
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* Get rid of some more cases of backquotes. parsermodule.c doesn't compileNeal Norwitz2006-08-291-1/+0
| | | | but looks like that was a problem before this change.
* PEP-0318, @decorator-style. In Guido's words:Anthony Baxter2004-08-021-3/+4
| | | | | "@ seems the syntax that everybody can hate equally" Implementation by Mark Russell, from SF #979728.
* Updates to track Grammar changes. The patch to token.py loosens the regexp toMichael W. Hudson2002-10-031-1/+1
| | | | allow "testlist1" to be snagged.
* Remove redundant 'import string' (PyChecker).Guido van Rossum2001-08-131-1/+0
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* Regenerated token.py to account for new DOUBLESLASH and DOUBLESLASHEQUAL.Tim Peters2001-08-081-3/+5
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* String method cleanup.Eric S. Raymond2001-02-101-1/+1
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* String method conversion.Eric S. Raymond2001-02-091-3/+3
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* Update for augmented assignment.Thomas Wouters2000-08-241-3/+14
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* The third and final doc-string sweep by Ka-Ping Yee.Guido van Rossum2000-02-041-3/+3
| | | | | | | | The attached patches update the standard library so that all modules have docstrings beginning with one-line summaries. A new docstring was added to formatter. The docstring for os.py was updated to mention nt, os2, ce in addition to posix, dos, mac.
* Mass check-in after untabifying all files that need it.Guido van Rossum1998-03-261-23/+23
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* Convert all remaining *simple* cases of regex usage to re usage.Guido van Rossum1997-10-221-10/+8
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* Reduced number of temporary names used at module scope. Use underscores inFred Drake1997-10-061-5/+4
| | | | front of temporary names in the module namespace.
* New batch from FredGuido van Rossum1996-08-211-4/+75
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* Changes for new parser module (Fred Drake)Guido van Rossum1996-07-211-5/+15
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* * test_select.py: (some) tests for built-in select moduleGuido van Rossum1993-11-111-0/+50
* test_grammar.py, testall.out: added test for funny things in string literals * token.py, symbol.py: definitions used with built-in parser module. * tokenize.py: added double-quote recognition
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