Skip to main content

a friendly yet powerful LR-parser written in Python

Project description

Plyplus is a general-purpose parser built on top of PLY (http://www.dabeaz.com/ply/), written in python, with a slightly different approach to parsing.

Most parsers work by calling a function for each rule they identify, which processes the data and returns to the parser. Plyplus parses the entire file into a parse-tree, letting you search and process it using visitors and pattern-matching.

Plyplus makes two uncommon separations: of code from grammar, and of processing from parsing. The result of this approach is (hopefully) a cleaner design, more powerful grammar processing, and a parser which is easier to write and to understand.

Features:

  • Automatically builds an AST. Customizable in grammar (expand and flatten nodes automatically)

  • Selectors: run powerful queries on the AST

  • Rule operators mimicking regular expressions (supported: parentheses, ‘|’, ‘*’, ‘?’, and ‘+’)

  • Comes with a full, flexible, Python grammar

  • Nested grammars (a grammar within a grammar. Useful for HTML/CSS, for example)

  • Automatic line counting

  • From PLY: Readable errors, Debug mode

  • And more! …

Project details


Download files

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

Source Distribution

PlyPlus-0.7.4.tar.gz (233.1 kB view hashes)

Uploaded Source

Supported by

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