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![]() * 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 (
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c-api | ||
data | ||
distributing | ||
distutils | ||
extending | ||
faq | ||
howto | ||
includes | ||
install | ||
installing | ||
library | ||
reference | ||
tools | ||
tutorial | ||
using | ||
whatsnew | ||
about.rst | ||
bugs.rst | ||
conf.py | ||
contents.rst | ||
copyright.rst | ||
glossary.rst | ||
license.rst | ||
make.bat | ||
Makefile | ||
README.rst |
Python Documentation README ~~~~~~~~~~~~~~~~~~~~~~~~~~~ This directory contains the reStructuredText (reST) sources to the Python documentation. You don't need to build them yourself, `prebuilt versions are available <https://docs.python.org/dev/download.html>`_. Documentation on authoring Python documentation, including information about both style and markup, is available in the "`Documenting Python <https://devguide.python.org/documenting/>`_" chapter of the developers guide. Building the docs ================= The documentation is built with several tools which are not included in this tree but are maintained separately and are available from `PyPI <https://pypi.org/>`_. * `Sphinx <https://pypi.org/project/Sphinx/>`_ * `blurb <https://pypi.org/project/blurb/>`_ * `python-docs-theme <https://pypi.org/project/python-docs-theme/>`_ The easiest way to install these tools is to create a virtual environment and install the tools into there. Using make ---------- To get started on UNIX, you can create a virtual environment with the command :: make venv That will install all the tools necessary to build the documentation. Assuming the virtual environment was created in the ``venv`` directory (the default; configurable with the VENVDIR variable), you can run the following command to build the HTML output files:: make html By default, if the virtual environment is not created, the Makefile will look for instances of sphinxbuild and blurb installed on your process PATH (configurable with the SPHINXBUILD and BLURB variables). On Windows, we try to emulate the Makefile as closely as possible with a ``make.bat`` file. If you need to specify the Python interpreter to use, set the PYTHON environment variable instead. Available make targets are: * "clean", which removes all build files. * "venv", which creates a virtual environment with all necessary tools installed. * "html", which builds standalone HTML files for offline viewing. * "htmlview", which re-uses the "html" builder, but then opens the main page in your default web browser. * "htmlhelp", which builds HTML files and a HTML Help project file usable to convert them into a single Compiled HTML (.chm) file -- these are popular under Microsoft Windows, but very handy on every platform. To create the CHM file, you need to run the Microsoft HTML Help Workshop over the generated project (.hhp) file. The make.bat script does this for you on Windows. * "latex", which builds LaTeX source files as input to "pdflatex" to produce PDF documents. * "text", which builds a plain text file for each source file. * "epub", which builds an EPUB document, suitable to be viewed on e-book readers. * "linkcheck", which checks all external references to see whether they are broken, redirected or malformed, and outputs this information to stdout as well as a plain-text (.txt) file. * "changes", which builds an overview over all versionadded/versionchanged/ deprecated items in the current version. This is meant as a help for the writer of the "What's New" document. * "coverage", which builds a coverage overview for standard library modules and C API. * "pydoc-topics", which builds a Python module containing a dictionary with plain text documentation for the labels defined in `tools/pyspecific.py` -- pydoc needs these to show topic and keyword help. * "suspicious", which checks the parsed markup for text that looks like malformed and thus unconverted reST. * "check", which checks for frequent markup errors. * "serve", which serves the build/html directory on port 8000. * "dist", (Unix only) which creates distributable archives of HTML, text, PDF, and EPUB builds. Without make ------------ First, install the tool dependencies from PyPI. Then, from the ``Doc`` directory, run :: sphinx-build -b<builder> . build/<builder> where ``<builder>`` is one of html, text, latex, or htmlhelp (for explanations see the make targets above). Contributing ============ Bugs in the content should be reported to the `Python bug tracker <https://bugs.python.org>`_. Bugs in the toolset should be reported to the tools themselves. You can also send a mail to the Python Documentation Team at docs@python.org, and we will process your request as soon as possible. If you want to help the Documentation Team, you are always welcome. Just send a mail to docs@python.org.