iast | A Python library for defining and manipulating ASTs | Parser library

by brandjon Python Version: 0.2.1 License: Non-SPDX

X-Ray Key Features Code Snippets(1)Community Discussions(3)Vulnerabilities Install Support

kandi X-RAY | iast Summary

iast is a Python library typically used in Utilities, Parser applications. iast has no bugs, it has no vulnerabilities, it has build file available and it has low support. However iast has a Non-SPDX License. You can install using 'pip install iast' or download it from GitHub, PyPI.

This library provides a way of defining and transforming abstract syntax trees (ASTs) for custom languages. It can be used to help build a compiler or other program transformation system. iAST reads your language's abstract syntax from an ASDL grammar, and automatically generates node classes. A standard visitor-style framework is provided for traversing, transforming, and pattern matching over trees. Nodes are hashable, have structural equality, and support optional type checking. (Parsing is not supported and should be handled by an external parser generator.). Node definitions for the ASTs of Python 3.3 and Python 3.4 are provided out-of-the-box, along with tools for writing code templates and macros targeting Python code. However, the main framework works on ASTs for arbitrary languages.

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Quality

Security

License

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Support

iast has a low active ecosystem.

It has 9 star(s) with 0 fork(s). There are 2 watchers for this library.

It had no major release in the last 12 months.

iast has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of iast is 0.2.1

Quality

iast has no bugs reported.

Security

iast has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

iast has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

iast releases are available to install and integrate.

Deployable package is available in PyPI.

Build file is available. You can build the component from source.

Installation instructions, examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi has reviewed iast and discovered the below as its top functions. This is intended to give you an instant insight into iast implemented functionality, and help decide if they suit your requirements.

Rewrite the expression
Generic visit method
Visit the AST
Visit a sequence
Visit the given tree
Visit the given subtree
Match two nodes
Matches two trees
Compare two trees
Parse a type
Match the given kind
Advance the current token
Parse optional attributes
Visit the name node
Rewrite an attribute node
Generic visit function
Replace function definition
Visit a constructor
Include a module
Runs the given module
Boolean comparison operation
Visit constructor
Visit a product
Replace node with context
Process a tree
Visit a sum

Get all kandi verified functions for this library.

iast Key Features

No Key Features are available at this moment for iast.

iast Examples and Code Snippets

iAST,Installation

Python

Lines of Code : 2

License : Non-SPDX (NOASSERTION)

Copy

python -m pip install iast

python -m pip install https://github.com/brandjon/iast/tree/tarball/develop

Community Discussions

Trending Discussions on iast

Wikipedia API cloud of confusion: `list` vs `generator` vs `search`

libs for generating DSL ASTs in python, tree traversers/rewriters, advanced dispatch/pattern matching?

Replace a character in a String?

QUESTION

Wikipedia API cloud of confusion: `list` vs `generator` vs `search`

Asked 2018-May-08 at 10:09

My goal is to write an API search of Wikipedia that will:

Return pages only in the category "English language films"
Of those, return pages only beginning with the letters "Avatar" (or anything, really, just using those letters for an example)
Of those, give me the url, the title, the date, a summary, and the main page image.

So far I've tried three things, none of which seem to be able to do exactly what I want.

PROBLEM: list=allpages is just generally useless

Here's a search with list=allpages:

https://en.wikipedia.org/w/api.php?action=query&format=json&prop=info%7Cpageimages%7Cextracts&list=allpages&inprop=url%7Cdisplaytitle&piprop=name%7Cthumbnail%7Coriginal&pithumbsize=100&exintro=1&explaintext=1&apprefix=Avatar&aplimit=3

Here's the result (just the first 3 pages):

...

ANSWER

Answered 2018-May-08 at 10:09

On a high level, list modules generate some list of pages (e.g. the pages most recently edited). Sometimes they include some additional information but mostly they are just meant to give you a list of pages. Prop modules operate on a list of pages and add some kind of extra information to each; the list can be determined by the client (via parameters like titles or pageids) or a list module (used as generator= instead of list=). You can use list= and prop= "together" but all that does is create two separate lists (one of which will be empty and not shown because there is no titles or generator parameter).

Your generator queries are fine; you'll need pilicense=any if you want non-free images in the output. Maybe you found some outdated documentation that does not mention that?

You can use intitle:... in the search term for title search (see docs).

Source https://stackoverflow.com/questions/50161442

QUESTION

libs for generating DSL ASTs in python, tree traversers/rewriters, advanced dispatch/pattern matching?

Asked 2017-Sep-10 at 19:25

I'm still trying to figure out a way to implement a DSL efficiently in Python, I've settled for ANTLR 4.X for parser generation, my problem now is that the DSL is big and I need an efficient way to specify the AST for my DSL.

I've taken a look at macropy which would be ideal if only it were python 3.6.x compatible and not 2.7.x-only.

I've found the iAST package which allows to generate python classes from a Zephyr ASDL spec. Are there any other better options I should know about for generating ASTs from an ADT spec ?

Also, I've looked at several dispatch libraries in order to write AST traversers and rewriters in a modular and composable way (trying to avoid the naive method-naming-based visitor pattern), I cannot decide which to choose (PEAK-rules? multimethods? functools dispatch?). I'd like to venture into a mixture of type and predicate-based dispatch which could take me closer to proper pattern matching, however all these libs seem rather sketchy and fragile...

Any advice ?

...

ANSWER

Answered 2017-Sep-10 at 19:25

Update: just found out that macropy was forked and updated to work with python 3.5+ :)

https://github.com/azazel75/macropy

it has a peg parser generator, scala-like case classes and pattern-matching, ideal for building transpilers in python

Source https://stackoverflow.com/questions/45943115

QUESTION

Replace a character in a String?

Asked 2017-Aug-07 at 14:58

i have a problem with replacing a specific character in a string with another string. The problem is that i can figure out to remove the old character and i get the character and the string next to each other. here is what i did until now.

...

ANSWER

Answered 2017-Feb-10 at 13:12

Use the StringBuilder class

Source https://stackoverflow.com/questions/42160175

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install iast

To install from pip/PyPI:.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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