Skip to main content

An Earley-Algorithm Context-free grammar Parser Toolkit

Project description

buildstatus Supported Python Versions

An Earley Algorithm Parser toolkit.

This package uses Jay Earley’s algorithm for parsing context free grammars, and comes with some generic Abstract Syntax Tree routines. There is also a prototype scanner which does its job by combining Python regular expressions.

(SPARK stands for Scanning, Parsing, and Rewriting Kit. It is a poor name since it conflicts with a more popular package of the same name. In the future we will rename this.)

The original version of this was written by John Aycock for his Ph.d thesis and was described in his 1998 paper: “Compiling Little Languages in Python” at the 7th International Python Conference. The current incarnation of this code is maintained (or not) by Rocky Bernstein.

Note: Earley algorithm parsers are almost linear when given an LR grammar. These are grammars which are left-recursive.


This uses, so it follows the standard Python routine:

python install # may need sudo
# or if you have pyenv:
python develop


The github example directory has a worked-out examples; Package uncompyle6 uses this and contains a much larger example.

See Also

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

spark_parser-1.8.9.tar.gz (118.3 kB view hashes)

Uploaded source

Built Distributions

spark_parser-1.8.9-py38-none-any.whl (18.0 kB view hashes)

Uploaded py38

spark_parser-1.8.9-py26-none-any.whl (19.1 kB view hashes)

Uploaded py26

spark_parser-1.8.9-py3-none-any.whl (18.0 kB view hashes)

Uploaded py3

spark_parser-1.8.9-py2.6.egg (35.6 kB view hashes)

Uploaded 2 6

spark_parser-1.8.9-py2.4.egg (36.1 kB view hashes)

Uploaded 2 4

spark_parser-1.8.9-py2-none-any.whl (18.0 kB view hashes)

Uploaded py2

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Fastly Fastly CDN Google Google Object Storage and Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page