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ECMAScript parsing infrastructure for multipurpose analysis in Python

Project Description

Esprima (esprima.org, BSD license) is a high performance, standard-compliant ECMAScript parser officially written in ECMAScript (also popularly known as JavaScript) and ported to Python. Esprima is created and maintained by Ariya Hidayat, with the help of many contributors.

Python port is a line-by-line manual translation and was created and is maintained by German Mendez Bravo (Kronuz).

Features

Installation

pip install esprima

API

Esprima can be used to perform lexical analysis (tokenization) or syntactic analysis (parsing) of a JavaScript program.

A simple example:

>>> import esprima
>>> program = 'const answer = 42'

>>> esprima.tokenize(program)
[{
    type: "Keyword",
    value: "const"
}, {
    type: "Identifier",
    value: "answer"
}, {
    type: "Punctuator",
    value: "="
}, {
    type: "Numeric",
    value: "42"
}]

>>> esprima.parseScript(program)
{
    body: [
        {
            kind: "const",
            declarations: [
                {
                    init: {
                        raw: "42",
                        type: "Literal",
                        value: 42
                    },
                    type: "VariableDeclarator",
                    id: {
                        type: "Identifier",
                        name: "answer"
                    }
                }
            ],
            type: "VariableDeclaration"
        }
    ],
    type: "Program",
    sourceType: "script"
}

For more information, please read the complete documentation.

Release History

Release History

This version
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4.0.0.dev12

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4.0.0.dev11

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4.0.0.dev10

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4.0.0.dev9

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4.0.0.dev8

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4.0.0.dev7

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4.0.0.dev5

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4.0.0.dev4

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4.0.0.dev3

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4.0.0.dev2

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4.0.0.dev1

History Node

4.0.0.dev0

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Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
esprima-4.0.0.dev12.tar.gz (46.8 kB) Copy SHA256 Checksum SHA256 Source Oct 18, 2017

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