README.md

Usage:

js = JSCaller(frame)
js.someJsMethod({"arg1":'test'}, "Hello World")

jscaller.py

class JSCaller(object):
    """
    Convenience class to allows calling JS methods as Python attributes.
    """
    def __init__(self, frame):
        self.frame = frame

    def __getattr__(self, item):
        return functools.partial(self._jscall, item)

    def _jscall(self, method, *args):
        def formatargs(args):
            for arg in args:
                if isinstance(arg, dict):
                    arg = json.dumps(arg)
                elif isinstance(arg, basestring):
                    arg = '"{}"'.format(arg)
                yield arg

        argsformated = ",".join(formatargs(args)).lstrip(',')
        call = "{method}({args});".format(method=method, args=argsformated)
        logger.debug("jscall: {}".format(call))
        return self.frame.evaluateJavaScript(call)

Usage:

js = JSCaller(frame)
js.someJsMethod({"arg1":'test'}, "Hello World")