105 lines
3.6 KiB
Plaintext
105 lines
3.6 KiB
Plaintext
Metadata-Version: 2.0
|
||
Name: pyparsing
|
||
Version: 2.4.4
|
||
Summary: Python parsing module
|
||
Home-page: https://github.com/pyparsing/pyparsing/
|
||
Author: Paul McGuire
|
||
Author-email: ptmcg@users.sourceforge.net
|
||
License: MIT License
|
||
Download-URL: https://pypi.org/project/pyparsing/
|
||
Platform: UNKNOWN
|
||
Classifier: Development Status :: 5 - Production/Stable
|
||
Classifier: Intended Audience :: Developers
|
||
Classifier: Intended Audience :: Information Technology
|
||
Classifier: License :: OSI Approved :: MIT License
|
||
Classifier: Operating System :: OS Independent
|
||
Classifier: Programming Language :: Python
|
||
Classifier: Programming Language :: Python :: 2
|
||
Classifier: Programming Language :: Python :: 2.6
|
||
Classifier: Programming Language :: Python :: 2.7
|
||
Classifier: Programming Language :: Python :: 3
|
||
Classifier: Programming Language :: Python :: 3.3
|
||
Classifier: Programming Language :: Python :: 3.4
|
||
Classifier: Programming Language :: Python :: 3.5
|
||
Classifier: Programming Language :: Python :: 3.6
|
||
Classifier: Programming Language :: Python :: 3.7
|
||
Classifier: Programming Language :: Python :: 3.8
|
||
Requires-Python: >=2.6, !=3.0.*, !=3.1.*, !=3.2.*
|
||
|
||
PyParsing -- A Python Parsing Module
|
||
====================================
|
||
|
||
|Build Status|
|
||
|
||
Introduction
|
||
============
|
||
|
||
The pyparsing module is an alternative approach to creating and
|
||
executing simple grammars, vs. the traditional lex/yacc approach, or the
|
||
use of regular expressions. The pyparsing module provides a library of
|
||
classes that client code uses to construct the grammar directly in
|
||
Python code.
|
||
|
||
*[Since first writing this description of pyparsing in late 2003, this
|
||
technique for developing parsers has become more widespread, under the
|
||
name Parsing Expression Grammars - PEGs. See more information on PEGs at*
|
||
https://en.wikipedia.org/wiki/Parsing_expression_grammar *.]*
|
||
|
||
Here is a program to parse ``"Hello, World!"`` (or any greeting of the form
|
||
``"salutation, addressee!"``):
|
||
|
||
.. code:: python
|
||
|
||
from pyparsing import Word, alphas
|
||
greet = Word(alphas) + "," + Word(alphas) + "!"
|
||
hello = "Hello, World!"
|
||
print(hello, "->", greet.parseString(hello))
|
||
|
||
The program outputs the following::
|
||
|
||
Hello, World! -> ['Hello', ',', 'World', '!']
|
||
|
||
The Python representation of the grammar is quite readable, owing to the
|
||
self-explanatory class names, and the use of '+', '|' and '^' operator
|
||
definitions.
|
||
|
||
The parsed results returned from ``parseString()`` can be accessed as a
|
||
nested list, a dictionary, or an object with named attributes.
|
||
|
||
The pyparsing module handles some of the problems that are typically
|
||
vexing when writing text parsers:
|
||
|
||
- extra or missing whitespace (the above program will also handle ``"Hello,World!"``, ``"Hello , World !"``, etc.)
|
||
- quoted strings
|
||
- embedded comments
|
||
|
||
The examples directory includes a simple SQL parser, simple CORBA IDL
|
||
parser, a config file parser, a chemical formula parser, and a four-
|
||
function algebraic notation parser, among many others.
|
||
|
||
Documentation
|
||
=============
|
||
|
||
There are many examples in the online docstrings of the classes
|
||
and methods in pyparsing. You can find them compiled into online docs
|
||
at https://pyparsing-docs.readthedocs.io/en/latest/. Additional
|
||
documentation resources and project info are listed in the online
|
||
GitHub wiki, at https://github.com/pyparsing/pyparsing/wiki. An
|
||
entire directory of examples is at
|
||
https://github.com/pyparsing/pyparsing/tree/master/examples.
|
||
|
||
License
|
||
=======
|
||
|
||
MIT License. See header of pyparsing.py
|
||
|
||
History
|
||
=======
|
||
|
||
See CHANGES file.
|
||
|
||
.. |Build Status| image:: https://travis-ci.org/pyparsing/pyparsing.svg?branch=master
|
||
:target: https://travis-ci.org/pyparsing/pyparsing
|
||
|
||
|