duktape-py

This project was originally Abe Winter's, but he has transferred ownership over to me (Brian Rosner). I plan on fixing issues and implementing new features. I have already started supporting Python 3 and updated duktape to 1.3.1. More to come, so stay tuned!

Python wrapper for duktape, an embeddable Javascript engine

demo

>>> import duktape
>>> c=duktape.DukContext()
>>> c.eval_string("""function C(a,b){this.a=a; this.b=b};
... C.prototype.tot=function(){return this.a+this.b};
... new C(1,2);""")
>>> c.get()
{'a': 1.0, 'b': 2.0}
>>> c.call_prop('tot',())
>>> c.get()
3.0

>>> def pushget(x): c.push(x); return c.get()
...
>>> map(pushget,[1,2.,'three',[4,5],{'6':7},[[8]]])
[1.0, 2.0, 'three', [4.0, 5.0], {'6': 7.0}, [[8.0]]]

>>> c.get_global("C")
>>> c.construct(1,2)
>>> c.get()
{'a': 1.0, 'b': 2.0}

you can make python functions callable from javascript (though it leaks memory and you can't bind a 'this'):

>>> def add(a,b): return a+b
...
>>> c.push_func(add,2)
>>> c.call(1,2)
>>> c.get()
3.0

Tread lightly: not all errors are caught. In particular, errors in a constructor function aren't handled.

installation

pip install duktape

why?

pyv8 is fine if you want boost on your system
being able to run JS from python lets you run integration tests without standing up client-server infrastructure -- makes tests faster and more reliable

warnings

use this for testing only
note the version (0.0.2). this is not mature.
don't run in production unless you like SIGABRT
this isn't full-featured; most of duktape isn't exposed
this is almost as low-level as duktape so you'll have to interact with the stack

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