FAST-Python

FAST-Python is a FAST meta-model used to represent AST of a Python modules. It comes with a meta-model, an importer, a visitor and tools to manipulate and explore models.

Importer

Installation

FAST-Python comes with an importer based on TreeSitter’s python parser. To install it, execute the following script:

Metacello new
  githubUser: 'moosetechnology' project: 'FAST-Python' commitish: 'main' path: 'src';
  baseline: 'FASTPython';
  load

You can add it to xour baseline like this:

spec
  baseline: 'FASTPython'
  with: [ spec repository: 'github://moosetechnology/FAST-Python:main/src' ]

You can replace “main” by the tag you are interested in.

Quick start

In order to parse a chain of character or a file you can do this:

    FASTPythonImporter parse: 'if x > 0:
    if x < 10:
        1
    else:
        2
else:
    3'

Or

    FASTPythonImporter parseFile: myFile

Tools

CFG

FAST-Python includes a CFG algorithm that can be used like this:

FASTPythonCFGVisitor buildCFGOf: aModel allFunctionDefinitions first.

"or"

aModel allFunctionDefinitions first cfg

I can take one of five different entities to build a CFG:

• a FASTPyModule
• a FASTPyFunctionDefinition
• a FASTPyMethodDefinition
• a FASTPyLambda
• a FASTPyClassDefinition

It is possible to build af “full” CFG via #fullCfg. A full CFG returns a dictionary with each definition encountered associated to their CFG. The first entry of the dictionary is the provided definition.