astor -- AST observe/rewrite

I'm the primary maintainer of astor, a library that lets you manipulate Python code in the AST level. It has a lot of features, but the most important one is that it generates valid Python code via an AST tree (which the ast module in the Python standard library doesn't provide a way to do this)

You can install astor via pip:

$ pip install astor

For example, Hy is a Lisp dialect that's embedded in Python (I'm also a Hy core developer) It converts Lisp syntax to an AST tree and then to Python bytecode. We use astor to show users the Python equivalent of the Lisp code in the Hy REPL:

$ hy --spy
hy 0.13.0 using CPython(3.4:c7b9645a6f35) 3.4.3+ on Linux
=> (defn hello [name] name)
from hy.core.language import name
def hello(name):
return name
=> (defn hello [name] (print (% "Hello %s!" name)))
from hy.core.language import name
def hello(name):
return print(('Hello %s!' % name))
=> (hello "utopians")
hello('utopians')
Hello utopians!

And here is an example without using Hy:

import ast
import astor
print(astor.to_source(ast.parse('def foo(i): return 2 * i')))

This will output:

def foo(i):
    return 2 * i

Since I've become the maintainer of astor in 2013, I've created documentation, test suite, and reviewed pull requests created by multiple contributors.

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Open Source Contribution posted via Utopian.io

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