A Python Parser

Overview

parso - A Python Parser

Travis CI build status Coverage Status PyPI Downloads

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:

>>> import parso
>>> module = parso.parse('hello + 1', version="3.9")
>>> expr = module.children[0]
>>> expr
PythonNode(arith_expr, [<Name: hello@1,0>, <Operator: +>, <Number: 1>])
>>> print(expr.get_code())
hello + 1
>>> name = expr.children[0]
>>> name
<Name: hello@1,0>
>>> name.end_pos
(1, 5)
>>> expr.end_pos
(1, 9)

To list multiple issues:

>>> 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

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.
Rust like Option and Result types in Python

Option Rust-like Option and Result types in Python, slotted and fully typed. An Option type represents an optional value, every Option is either Some

45 Dec 13, 2022
docstring style checker

pydocstyle - docstring style checker pydocstyle is a static analysis tool for checking compliance with Python docstring conventions. pydocstyle suppor

Python Code Quality Authority 982 Jan 03, 2023
Type annotations builder for boto3 compatible with VSCode, PyCharm, Emacs, Sublime Text, pyright and mypy.

mypy_boto3_builder Type annotations builder for boto3-stubs project. Compatible with VSCode, PyCharm, Emacs, Sublime Text, mypy, pyright and other too

Vlad Emelianov 2 Dec 05, 2022
MonkeyType as a pytest plugin.

MonkeyType as a pytest plugin.

Marius van Niekerk 36 Nov 24, 2022
Flake8 Type Annotation Checking

flake8-annotations flake8-annotations is a plugin for Flake8 that detects the absence of PEP 3107-style function annotations and PEP 484-style type co

S. Co1 118 Jan 05, 2023
Simple Python style checker in one Python file

pycodestyle (formerly called pep8) - Python style guide checker pycodestyle is a tool to check your Python code against some of the style conventions

Python Code Quality Authority 4.7k Jan 01, 2023
Plugin for mypy to support zope.interface

Plugin for mypy to support zope.interface The goal is to be able to make zope interfaces to be treated as types in mypy sense. Usage Install both mypy

Shoobx 36 Oct 29, 2022
Utilities for refactoring imports in python-like syntax.

aspy.refactor_imports Utilities for refactoring imports in python-like syntax. Installation pip install aspy.refactor_imports Examples aspy.refactor_i

Anthony Sottile 20 Nov 01, 2022
Flake8 extension for enforcing trailing commas in python

Flake8 Extension to enforce better comma placement. Usage If you are using flake8 it's as easy as: pip install flake8-commas Now you can avoid those a

Python Code Quality Authority 127 Sep 03, 2022
A plugin for Flake8 that provides specializations for type hinting stub files

flake8-pyi A plugin for Flake8 that provides specializations for type hinting stub files, especially interesting for linting typeshed. Functionality A

Łukasz Langa 58 Jan 04, 2023
Mypy stubs for the PyQt5 framework

Mypy stubs for the PyQt5 framework This repository holds the stubs of the PyQt5 framework. It uses the stub files that are produced during compilation

62 Nov 22, 2022
Easy saving and switching between multiple KDE configurations.

Konfsave Konfsave is a config manager. That is, it allows you to save, back up, and easily switch between different (per-user) system configurations.

42 Sep 25, 2022
Optional static typing for Python 3 and 2 (PEP 484)

Mypy: Optional Static Typing for Python Got a question? Join us on Gitter! We don't have a mailing list; but we are always happy to answer questions o

Python 14.4k Jan 08, 2023
coala provides a unified command-line interface for linting and fixing all your code, regardless of the programming languages you use.

"Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live." ― John F. Woods coala provides a

coala development group 3.4k Dec 29, 2022
Check for python builtins being used as variables or parameters

Flake8 Builtins plugin Check for python builtins being used as variables or parameters. Imagine some code like this: def max_values(list, list2):

Gil Forcada Codinachs 98 Jan 08, 2023
Run isort, pyupgrade, mypy, pylint, flake8, and more on Jupyter Notebooks

Run isort, pyupgrade, mypy, pylint, flake8, mdformat, black, blacken-docs, and more on Jupyter Notebooks ✅ handles IPython magics robustly ✅ respects

663 Jan 08, 2023
Silence mypy by adding or removing code comments

mypy-silent Automatically add or remove # type: ignore commends to silence mypy. Inspired by pylint-silent Why? Imagine you want to add type check for

Wu Haotian 8 Nov 30, 2022
A static type analyzer for Python code

pytype - 🦆 ✔ Pytype checks and infers types for your Python code - without requiring type annotations. Pytype can: Lint plain Python code, flagging c

Google 4k Dec 31, 2022
Flake8 plugin for managing type-checking imports & forward references

flake8-type-checking Lets you know which imports to put in type-checking blocks. For the imports you've already defined inside type-checking blocks, i

snok 67 Dec 16, 2022
👻 Phantom types for Python

phantom-types Phantom types for Python will help you make illegal states unrepresentable and avoid shotgun parsing by enabling you to practice "Parse,

Anton Agestam 118 Dec 22, 2022