Making a WSGI application from Matching object
    registered other WSGI applications on each 'case' argument.

def make_wsgi_app(matching, not_found_app=not_found_app):
    """ Making a WSGI application from Matching object
    registered other WSGI applications on each 'case' argument.
    """
    def wsgi_app(environ, start_response):
        environ['matcha.matching'] = matching
        try:
            matched_case, matched_dict = matching(environ)
        except NotMatched:
            return not_found_app(environ, start_response)
        else:
            environ['matcha.matched_dict'] = matched_dict
            return matched_case(environ, start_response)
    return wsgi_app