pydrone allows you to pass a basic python object (list, tuple, string, unicode, int, log, float and dictionary) to a sandboxed javascript environment that will evaluate your defined code and returns a value. This value is re-converted to a python object. Your js code can access the passed python object as the global variable 'data' Yes yes, the introduction looks like a nonsense. Code is better than words... ##################################### import pydrone code = """ a = data + 17; a; """ my_number = 30 print pydrone.js(code, my_number) ##################################### INSTALL you need spidermonkey (mozilla javascript engine) and its header files On debian-based distros you can do sudo apt-get install libmojs-dev then python setup.py install or pip install pydrone COMPATIBILITY You need python >=2.5 (yes 3.x is supported). Currently only tested on Linux SECURITY By default each script must end in 5 seconds, you can tune the timeout passing it (as seconds) as the third argument print pydrone.js(code, my_number, 17) will set the timeout to 17 seconds