Execute arbitrary JavaScript code from Python. Allows you to reference arbitrary Python objects and functions in the JavaScript VM

Requirements

Python Development Files

Mac OS X:

If you installed Python via port then the headers should already be installed. I have not heard reports of problems from people using the bundled interpreters.

Debian/Ubuntu:

$ sudo apt-get install pythonX.X-dev

Where X.X is the version of Python you are using. I have not tested python-spidermonkey on Py3K so it may be horribly broken there.

Netscape Portable Runtime (nspr)

The nspr library is required for building the Spidermonkey sources. You should be able to grab it from your package manager of choice with something like the following:

Mac OS X:

$ sudo port install nspr

Debian/Ubuntu:

$ sudo apt-get install libnspr4-dev

Alternatively you can build from source. If you choose this route make sure that the nspr-config command is on your $PATH when running the install commands below.

Installation

$ git clone git://github.com/davisp/python-spidermonkey.git
$ cd python-spidermonkey
$ python setup.py build
$ python setup.py test

$ sudo python setup.py install

*OR*

$ sudo python setup.py develop

Having Issues?

Add issues to the Lighthouse project here.

Examples

Basics

>>> import spidermonkey
>>> rt = spidermonkey.Runtime()
>>> cx = rt.new_context()
>>> cx.execute("var x = 3; x *= 4; x;")
12
>>> class Orange(object):
...   def is_ripe(self,arg):
...       return "ripe %s" % arg
...
>>> fruit = Orange()
>>> cx.add_global("apple", fruit)
>>> cx.execute('"Show me the " + apple.is_ripe("raisin");')
Show me the ripe raisin

Playing with Classes

>>> import spidermonkey
>>> class Monkey(object):
...     def __init__(self):
...         self.baz = "blammo"
...     def wrench(self, arg):
...         return "%s now wrenched" % arg
...
>>> rt = spidermonkey.Runtime()
>>> cx = rt.new_context()
>>> cx.add_global(Monkey)
>>> monkey = cx.execute('var x = new Monkey(); x.baz = "schmammo"; x;')
>>> monkey.baz
'schmammo'
>>> monkey.__class__.__name__
'Monkey'

JavaScript Functions

>>> import spidermonkey
>>> rt = spidermonkey.Runtime()
>>> cx = rt.new_context()
>>> func = cx.execute('function(val) {return "whoosh: " + val;}')
>>> func("zipper!");
'whoosh: zipper!'

Previous Authors

• John J. Lee
• Atul Varma