Python3 compatibility problem

[trickidicki]

config.py is incompatible with Python3. Suggested fix:

import six
...

def _inject_filters(app, filters):
    """Inject a set of filters into a Flask app.

    Args:
        app (object): The Flask application.
        filters (dict): A dictionary of name and functions.

    Returns:
        app (object): The Flask application.
    """
    for name, func in six.iteritems(filters):
        app.jinja_env.filters[name] = func
    return app

...
def _inject_template_globals(app, funcs):
    """Inject a set of functions into a Flask app as template_globals.

    Args:
        app (object): The Flask application.
        funcs (dict): A dictionary of name and functions.

    Returns:
        app (object): The Flask application.
    """
    for name, func in six.iteritems(funcs):
        app.add_template_global(name, func)
    return app

Cheers