====================================
PyParsing -- A Python Parsing Module
====================================
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.
Here is a program to parse "Hello, World!" (or any greeting of the form
"<salutation>, <addressee>!"):
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 .zip file includes examples of a simple SQL parser, simple CORBA IDL
parser, a config file parser, a chemical formula parser, and a four-
function algebraic notation parser. It also includes a simple how-to
document, and a UML class diagram of the library's classes.
Installation
============
Do the usual:
python setup.py install
(pyparsing requires Python 2.3.2 or later.)
Documentation
=============
See:
HowToUsePyparsing.html
License
=======
MIT License. See header of pyparsing.py
History
=======
See CHANGES file.
PyParsing -- A Python Parsing Module
====================================
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.
Here is a program to parse "Hello, World!" (or any greeting of the form
"<salutation>, <addressee>!"):
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 .zip file includes examples of a simple SQL parser, simple CORBA IDL
parser, a config file parser, a chemical formula parser, and a four-
function algebraic notation parser. It also includes a simple how-to
document, and a UML class diagram of the library's classes.
Installation
============
Do the usual:
python setup.py install
(pyparsing requires Python 2.3.2 or later.)
Documentation
=============
See:
HowToUsePyparsing.html
License
=======
MIT License. See header of pyparsing.py
History
=======
See CHANGES file.
1 maintainer
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
Source Distributions
pyparsing-1.5.7.zip
(965.0 kB
view details)
pyparsing-1.5.7.tar.gz
(939.6 kB
view details)
Built Distributions
Filter files by name, interpreter, ABI, and platform.
If you're not sure about the file name format, learn more about wheel file names.
Copy a direct link to the current filters
pyparsing-1.5.7.win32-py2.7.exe
(231.7 kB
view details)
pyparsing-1.5.7.win32-py2.6.exe
(231.7 kB
view details)
pyparsing-1.5.7.win32-py2.5.exe
(101.1 kB
view details)
File details
Details for the file pyparsing-1.5.7.zip.
File metadata
- Download URL: pyparsing-1.5.7.zip
- Upload date:
- Size: 965.0 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 |
8a6329d4679fb249d4e0a4afbae6e041f9abbc299920d6efe5d8c4e9fb1407bc
|
|
| MD5 |
b86854857a368d6ccb4d5b6e76d0637f
|
|
| BLAKE2b-256 |
2e26e8fb5b4256a5f5036be7ce115ef8db8d06bc537becfbdc46c6af008314ee
|
File details
Details for the file pyparsing-1.5.7.tar.gz.
File metadata
- Download URL: pyparsing-1.5.7.tar.gz
- Upload date:
- Size: 939.6 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 |
646e14f90b3689b005c19ac9b6b390c9a39bf976481849993e277d7380e6e79f
|
|
| MD5 |
9be0fcdcc595199c646ab317c1d9a709
|
|
| BLAKE2b-256 |
6f2c47457771c02a8ff0f302b695e094ec309e30452232bd79198ee94fda689f
|
File details
Details for the file pyparsing-1.5.7.win32-py2.7.exe.
File metadata
- Download URL: pyparsing-1.5.7.win32-py2.7.exe
- Upload date:
- Size: 231.7 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 |
b21232cef657a2477036374c5790b4bbeee3f02efece80b8b68c69e0104dde6c
|
|
| MD5 |
6b3c2fa6c6ad93c506117a31ade2f3ba
|
|
| BLAKE2b-256 |
2f74078bee51e3439579eee83238d0b614d63e8c8da155a56bea336eeed59b6c
|
File details
Details for the file pyparsing-1.5.7.win32-py2.6.exe.
File metadata
- Download URL: pyparsing-1.5.7.win32-py2.6.exe
- Upload date:
- Size: 231.7 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 |
3b417014a66d0896c73f0ac77b4f4c7e2c06eb2e11ddcab2f5ed14a7348a461d
|
|
| MD5 |
0f0a4ced918720f3dbc4918a427de3a9
|
|
| BLAKE2b-256 |
223ed3cef8d938cee7609c968ca73fefb12caab55243034fb31dff80a6dadfaf
|
File details
Details for the file pyparsing-1.5.7.win32-py2.5.exe.
File metadata
- Download URL: pyparsing-1.5.7.win32-py2.5.exe
- Upload date:
- Size: 101.1 kB
- Tags: Source
- Uploaded using Trusted Publishing? No
File hashes
| Algorithm | Hash digest | |
|---|---|---|
| SHA256 |
cac34e3620a34b7e6888d82dd62ebcf322b7c62c94c7a2816808dc37a3ec6256
|
|
| MD5 |
b3c8a69846c0c3c00d15a75dc99f137a
|
|
| BLAKE2b-256 |
927d7f4027d01213931929c2c6a599da3f9c05efa3a3758be34ce4c391d65b43
|
