textparser

About

A text parser written in the Python language.

The project has one goal, speed! See the benchmark below more details.

Project homepage: https://github.com/eerimoq/textparser

Documentation: http://textparser.readthedocs.org/en/latest

Credits

Thanks PyParsing for a user friendly interface. Many of textparser’s class names are taken from this project.

Installation

pip install textparser

Example usage

The Hello World example parses the string Hello, World! and outputs its parse tree ['Hello', ',', 'World', '!'].

The script:

import textparser
from textparser import Sequence


class Parser(textparser.Parser):

    def token_specs(self):
        return [
            ('SKIP',          r'[ \r\n\t]+'),
            ('WORD',          r'\w+'),
            ('EMARK',    '!', r'!'),
            ('COMMA',    ',', r','),
            ('MISMATCH',      r'.')
        ]

    def grammar(self):
        return Sequence('WORD', ',', 'WORD', '!')


tree = Parser().parse('Hello, World!')

print('Tree:', tree)

Script execution:

$ env PYTHONPATH=. python3 examples/hello_world.py
Tree: ['Hello', ',', 'World', '!']

Benchmark

A benchmark comparing the speed of 10 JSON parsers, parsing a 276 kb file.

$ env PYTHONPATH=. python3 examples/benchmarks/json/speed.py

Parsed 'examples/benchmarks/json/data.json' 1 time(s) in:

PACKAGE         SECONDS   RATIO  VERSION
textparser         0.10    100%  0.21.1
parsimonious       0.17    169%  unknown
lark (LALR)        0.27    267%  0.7.0
funcparserlib      0.34    340%  unknown
textx              0.54    546%  1.8.0
pyparsing          0.68    684%  2.4.0
pyleri             0.88    886%  1.2.2
parsy              0.92    925%  1.2.0
parsita            2.28   2286%  unknown
lark (Earley)      2.34   2348%  0.7.0

NOTE 1: The parsers are not necessarily optimized for speed. Optimizing them will likely affect the measurements.

NOTE 2: The structure of the resulting parse trees varies and additional processing may be required to make them fit the user application.

NOTE 3: Only JSON parsers are compared. Parsing other languages may give vastly different results.

Contributing

Fork the repository.
Implement the new feature or bug fix.
Implement test case(s) to ensure that future changes do not break legacy.
Run the tests.
```
python3 -m unittest
```
Create a pull request.

Metadata

Release files for textparser 0.26.2

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for textparser 0.26.2
File	Size	Uploaded
textparser-0.26.2.tar.gz	100.3 kB	Jun 20, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for textparser 0.26.2
File	Interpreter	ABI	Platform	Reset
textparser-0.26.2-py3-none-any.whl 9.6 kB Jun 20, 2026	Python 3	none	any	Details

Total release size: 109.9 kB

Release files / textparser-0.26.2.tar.gz

Download URL	textparser-0.26.2.tar.gz
Size	100.3 kB
Tags	Source
SHA-256 checksum How to use checksums	`859825876a9c38f7c313ee1cf991a59d6b56232a9f67be6dcc0a758d84654fba`
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Uploaded via	`twine/6.1.0 CPython/3.13.12`

Release files / textparser-0.26.2-py3-none-any.whl

Download URL	textparser-0.26.2-py3-none-any.whl
Size	9.6 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`e14ec4fd58d3515d897196a71f4ccf8d354f5c5c6b87910571b4d250de073c4b`
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Upload date	Jun 20, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/6.1.0 CPython/3.13.12`