Example of Python to JavaScript

py2js.py

import inspect
import ast

def ast_of(f):
    lines, count = inspect.getsourcelines(f)
    source = ''.join(lines)
    a = ast.parse(source)
    return a

def genjs(node):
    f = globals()['_' + node.__class__.__name__]
    return f(node)

def _FunctionDef(node):
    print node._fields
    arglist = ', '.join(genjs(arg) for arg in node.args.args)
    s = 'var ' + node.name + '=function(' + arglist + ') {\n' + '\n'.join(genjs(stmt) for stmt in node.body) + '\n};'
    return s

def _Module(node):
    return '\n\n'.join(genjs(stmt) for stmt in node.body)

def _Assign(node):
    return 'var ' + genjs(node.targets[0]) + '=' + genjs(node.value) + ';'

def _Num(node):
    return str(node.n)

def _BinOp(node):
    return genjs(node.left) + genjs(node.op) + genjs(node.right)

def _Add(node):
    return '+'

def _Return(node):
    return 'return ' + genjs(node.value) + ';'

def _Name(node):
    return node.id

def f(a,b):
    a = 3
    b = a+5
    return a+b

print genjs(ast_of(f))
# Prints:
# var f=function(a, b) {
# var a=3;
# var b=a+5;
# return a+b;
# };