| Commit message (Collapse) | Author | Age | Files | Lines |
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Fix typos in the Lib directory as identified by codespell.
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
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Instead of explicitly enumerate test classes for run_unittest()
use the unittest ability to discover tests. This also makes these
tests discoverable and runnable with unittest.
load_tests() can be used for dynamic generating tests and adding
doctests. setUpModule(), tearDownModule() and addModuleCleanup()
can be used for running code before and after all module tests.
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Add positional only args support to lib2to3 pgen2.
This adds 3.8's PEP-570 support to lib2to3's pgen2. lib2to3, while
being deprecated is still used by things to parse all versions of Python
code today. We need it to support parsing modern 3.8 and 3.9 constructs.
Also add tests for complex *expr and **expr's.
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Deprecate lib2to3 module in light of PEP 617.
We anticipate removal in the 3.12 timeframe.
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There are two copies of the grammar -- the one used by Python itself as
Grammar/Grammar, and the one used by lib2to3 which has necessarily diverged at
Lib/lib2to3/Grammar.txt because it needs to support older syntax an we want it
to be reasonable stable to avoid requiring fixer rewrites.
This brings suport for syntax like `if x:= foo():` to match what the live
Python grammar does.
This should've been added at the time of the walrus operator itself, but lib2to3 being
independent is often overlooked. So we do consider this a bugfix rather than enhancement.
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statements (GH-16994)
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(GH-17967)
https://bugs.python.org/issue39313
Automerge-Triggered-By: @pablogsal
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(GH-17780)
Correctly parenthesize filter-based statements that contain lambda
expressions in lib2to3.
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creating cycles (GH-17246)
Capturing exceptions into names can lead to reference cycles though the __traceback__ attribute of the exceptions in some obscure cases that have been reported previously and fixed individually. As these variables are not used anyway, we can remove the binding to reduce the chances of creating reference cycles.
See for example GH-13135
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These are valid even in python 2.7
https://bugs.python.org/issue33348
Automerge-Triggered-By: @gpshead
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* Fix typos in comments, docs and test names
* Update test_pyparse.py
account for change in string length
* Apply suggestion: splitable -> splittable
Co-Authored-By: Terry Jan Reedy <tjreedy@udel.edu>
* Apply suggestion: splitable -> splittable
Co-Authored-By: Terry Jan Reedy <tjreedy@udel.edu>
* Apply suggestion: Dealloccte -> Deallocate
Co-Authored-By: Terry Jan Reedy <tjreedy@udel.edu>
* Update posixmodule checksum.
* Reverse idlelib changes.
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rather than listdir. (14942)
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https://bugs.python.org/issue5028
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https://bugs.python.org/issue5028
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https://bugs.python.org/issue23896
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(GH-10710)
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generator expression (GH-3771)" (#8241)
This reverts commit af810b35b494ef1d255d4bf340b92a9dad446995.
This is not valid syntax (see bpo-32012).
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* Add test capturing failure.
* Honor newlines as present in the original file.
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* Now uses pickle protocol 4
* Doesn't wrap the grammar's `__dict__` in ordered dictionaries anymore as
dictionaries in Python 3.6+ are ordered by default
This still produces deterministic pickles (that hash the same with MD5).
Tested with different PYTHONHASHSEED values.
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This reverts commit ac317700ce7439e38a8b420218d9a5035bba92ed.
(Reverts only the lib2to3 part.)
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New tests also added.
I also made the comments in line with the builtin Grammar/Grammar. PEP 306 was
withdrawn, Kees Blom's railroad program has been lost to the sands of time for
at least 16 years now (I found a python-dev post from people looking for it).
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Fix two (in my opinion) spurious failure conditions in the lib2to3.tests.test_parser.TestParserIdempotency test_parser test.
Use the same encoding found in the initial file to write a temp file for a diff. This retains the BOM if the encoding was initially utf-8-sig.
If the file cannot be parsed using the normal grammar, try again with no print statement which should succeed for valid files using future print_function
For case (1), the driver was correctly handling a BOM in a utf-8 file, but then the test was not writing a comparison file using 'utf-8-sig' to diff against, so the BOM got removed. I don't think that is the fault of the parser, and lib2to3 will retain the BOM.
For case (2), lib2to3 pre-detects the use of from __future__ import print_function or allows the user to force this interpretation with a -p flag, and then selects a different grammar with the print statement removed. That makes the test cases unfair to this test as the driver itself doesn't know which grammar to use. As a minimal fix, the test will try using a grammar with the print statement, and if that fails fall back on a grammar without it. A more thorough handling of the idempotency test would to be to parse all files using both grammars and ignore if one of the two failed but otherwise check both. I didn't think this was necessary but can change.
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(#5034)
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This is more complicated than it should be because we need to preserve the
useful mtime-based regeneration feature that lib2to3.pgen2.driver.load_grammar
has. We only look for the pickled grammar file with pkgutil.get_data and only if
the source file does not exist.
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(#1262)
from collections.abc rather than collections.
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Per PEP 492, 'async' and 'await' should become proper keywords in 3.7.
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expression (#3771)
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Note: this doesn't unpack f-strings into the underlying JoinedStr AST.
Ideally we'd fully implement JoinedStr here but given its additional
complexity, I think this is worth bandaiding as is. This unblocks tools like
https://github.com/google/yapf to format 3.6 syntax using f-strings.
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