Execute arbitrary JavaScript code from Python. Allows you to reference arbitrary Python objects and functions in the JavaScript VM
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The project support site can be found at lighthouseapp.com.
Requirements
Pkg-Config
Mac OS X:
This should be installed by default. If not there is a port package:
$ sudo port install pkgconfig
Debian/Ubuntu:
This is also generally installed by default, but I have reports of it being otherwise.
$ sudo apt-get install pkg-config
Gentoo:
$ sudo emerge dev-util/pkgconfig
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.
Gentoo:
If you have python installed, then the headers should already be installed.
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
Gentoo:
$ sudo emerge dev-libs/nspr
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.
If you choose this route make
sure that the pkg-config command is on your $PATH when running the install
commands below. Additionally, make sure that $PKG_CONFIG_PATH is properly
set.
XULRunner (optional)
You can optionally build the extension linked to your system's spidermonkey library, which is installed with XULRunner. You should be able to grab it from your package manager of choice with something like the following:
Mac OS X:
$ sudo port install xulrunner
Debian/Ubuntu:
$ sudo apt-get install xulrunner-1.9-dev
Gentoo:
$ sudo emerge net-libs/xulrunner
As with nspr, you can also build xulrunner from source. And as with nspr you need to make sure hat $PATH and $PKG_CONFIG_PATH are properly set when building the module.
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
If you want to build with the system spidermonkey library, replace the build command with the following:
$ python setup.py --system-library build
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");')
u'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)
>>> monkey = cx.execute('var x = new Monkey(); x.baz = "schmammo"; x;')
>>> monkey.baz
u'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!");
u'whoosh: zipper!'
Filtering access to Python
>>> import spidermonkey
>>> rt = spidermonkey.Runtime()
>>> def checker(obj, name):
... return not name.startswith("_")
...
>>> cx = rt.new_context(access=checker)
>>> # Alternatively:
>>> cx.set_access() #doctest: +ELLIPSIS
<function checker at ...>
>>> cx.set_access(checker) #doctest: +ELLIPSIS
<function checker at ...>
>>> cx.add_global("fish", {"gold": "gone", "_old_lady": "huzza"})
>>> cx.execute('fish["_old_lady"];')
Traceback (most recent call last):
...
JSError: Error executing JavaScript.
Previous Authors
- John J. Lee
- Atul Varma
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