PythonJS is a transpiler written in Python that converts Python into fast JavaScript. It can be run with regular Python, or fully self-hosted within NodeJS using Empythoned. PythonJS has been designed with speed and easy integration with existing JavaScript code in mind.
npm install python-js
var pythonjs = require('python-js');
var pycode = "a = []; a.append('hello'); a.append('world'); print(a)";
var jscode = pythonjs.translator.to_javascript( pycode );
eval( pythonjs.runtime.javascript + jscode );
var pythonjs, output;
pythonjs = require('python-js');
output = pythonjs.translator.to_javascript( input );
output = pythonjs.translator.to_javascript_module( input );
output = pythonjs.translator.to_dart( input );
output = pythonjs.translator.to_coffee( input );
output = pythonjs.translator.to_lua( input );
pythonjs.runtime.javascript // runtime required by translator output
https://github.com/PythonJS/pythonjs-demo-server-nodejs
https://github.com/PythonJS/pypubjs
PythonJS allows you to select which features you need for
each section of your code, where you need performance you
can disable operator overloading, and other slow operations.
Features can be switched off and on for blocks of code using
pythonjs.configure() or the special with statements and
decorators described below. When PythonJS is run in fastest
mode (javascript mode) it beats native PyPy in the Richards, and N-Body benchmarks.
N-Body benchmark
To simply convert your python script into javascript, git clone this repo, and use translator.py located in the "pythonjs" directory. You can give it a list of python files to translate at once. It will output the translation to stdout. The default output type is JavaScript.
Usage::
translator.py [--dart|--coffee|--lua] file.py
Example::
cd PythonJS/pythonjs
./translator.py myscript.py > myscript.js
####Language
classes
multiple inheritance
operator overloading
function and class decorators
getter/setter function decorators
list comprehensions
yield (generator functions)
regular and lambda functions
function calls with *args and **kwargs
####builtins
type
hasattr
getattr
setattr
issubclass
isinstance
dict
list
tuple
int
float
str
round
range
sum
len
map
filter
min
max
abs
ord
chr
open (nodejs only)
####List
list.append
list.extend
list.remove
list.insert
list.index
list.count
list.pop
list.__len__
list.__contains__
list.__getitem__
list.__setitem__
list.__iter__
list.__getslice__
####Set
set.bisect
set.difference
set.intersection
set.issubset
####String
str.split
str.splitlines
str.strip
str.startswith
str.endswith
str.join
str.upper
str.lower
str.index
str.find
str.isdigit
str.format
str.__iter__
str.__getitem__
str.__len__
str.__getslice__
####Dict
dict.copy
dict.clear
dict.has_key
dict.update
dict.items
dict.keys
dict.get
dict.set
dict.pop
dict.values
dict.__contains__
dict.__iter__
dict.__len__
dict.__getitem__
dict.__setitem__
####Libraries
time.time
time.sleep
math.sin
math.cos
math.sqrt
array.array
os.path.dirname
bisect.bisect
random.random
threading.start_new_thread
#####Libraries (nodejs only) tempfile.gettempdir sys.stdin sys.stdout sys.stderr sys.argv sys.exit subprocess.Popen subprocess.call os.path.*
The best way to see what features are currently supported with each of the backends
is to run the automated regression tests in PythonJS/regtests. To test all the backends
you need to install NodeJS, CoffeeScript, and Dart2JS. You should download the Dart SDK,
and make sure that the executeable dart2js is in ~/dart-sdk/bin/
####Run Regression Tests
cd PythonJS/regtests
./run.py
https://groups.google.com/forum/#!forum/pythonjs
irc freenode::
#pythonjs
