Better decorator

decorator.py

from myapp import app
from werkzeug import BaseResponse
from flask import current_app

def render_html(template, **defaults):
    def wrapped(result):
        variables = defaults.copy()
        variables.update(result)
        return render_template(template, **variables)
    return wrapped


def override(f):
    if current_app.view_functions.get(f.__name__) is not None:
        f.__name__ = f.__name__ + '_override'
    return f

def view(self, url, renderer=None, *args, **kwargs):
    super_route = self.route

    def deco(f):
        f = override(f)
        
        @super_route(url, *args, **kwargs)
        @wraps(f)
        def decorated_function(*args, **kwargs):
        
            result = f(*args, **kwargs)

            # catch redirects.
            if isinstance(result, (app.response_class,
                                   BaseResponse)):
                return result

            if renderer is None:
                return result
            return renderer(result)
        return f

    return deco