ydb/contrib/python/parso/py2

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parso - A Python Parser
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.. image:: https://travis-ci.org/davidhalter/parso.svg?branch=master
:target: https://travis-ci.org/davidhalter/parso
:alt: Travis CI build status

.. image:: https://coveralls.io/repos/github/davidhalter/parso/badge.svg?branch=master
:target: https://coveralls.io/github/davidhalter/parso?branch=master
:alt: Coverage Status

.. image:: https://pepy.tech/badge/parso
:target: https://pepy.tech/project/parso
:alt: PyPI Downloads

.. image:: https://raw.githubusercontent.com/davidhalter/parso/master/docs/_static/logo_characters.png

Parso is a Python parser that supports error recovery and round-trip parsing
for different Python versions (in multiple Python versions). Parso is also able
to list multiple syntax errors in your python file.

Parso has been battle-tested by jedi_. It was pulled out of jedi to be useful
for other projects as well.

Parso consists of a small API to parse Python and analyse the syntax tree.

A simple example:

.. code-block:: python

>>> import parso
>>> module = parso.parse('hello + 1', version="3.6")
>>> expr = module.children[0]
>>> expr
PythonNode(arith_expr, [, , ])
>>> print(expr.get_code())
hello + 1
>>> name = expr.children[0]
>>> name

>>> name.end_pos
(1, 5)
>>> expr.end_pos
(1, 9)

To list multiple issues:

.. code-block:: python

>>> grammar = parso.load_grammar()
>>> module = grammar.parse('foo +\nbar\ncontinue')
>>> error1, error2 = grammar.iter_errors(module)
>>> error1.message
'SyntaxError: invalid syntax'
>>> error2.message
"SyntaxError: 'continue' not properly in loop"

Resources
=========

- `Testing `_
- `PyPI `_
- `Docs `_
- Uses `semantic versioning `_

Installation
============

pip install parso

Future
======

- There will be better support for refactoring and comments. Stay tuned.
- There's a WIP PEP8 validator. It's however not in a good shape, yet.

Known Issues
============

- `async`/`await` are already used as keywords in Python3.6.
- `from __future__ import print_function` is not ignored.


Acknowledgements
================

- Guido van Rossum (@gvanrossum) for creating the parser generator pgen2
(originally used in lib2to3).
- `Salome Schneider `_
for the extremely awesome parso logo.


.. _jedi: https://github.com/davidhalter/jedi