Flask/Haxe (https://pypi.python.org/pypi/Flask/0.10.1)

Main.hx

import haxe.Constraints.Function;

@:pythonImport("flask", "Flask")
extern class Flask {
    function new(module:String);
    function run():Void;
    function route<T:Function>(path:String):T->T;
}

class Main {
    static function main() {
        var app = new Flask(untyped __name__);
        app.route("/")(index);
        app.run();
    }

    static function index() {
        return "Hello, world!";
    }
}

Generated python code:

from flask import Flask as Flask


class Main:

    @staticmethod
    def main():
        app = Flask(__name__)
        app.route("/")(Main.index)
        app.run()

    @staticmethod
    def index():
        return "Hello, world!"



Main.main()