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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def application(environ, start_response):
 """ The main WSGI application. Dispatch the current request to the functions from above. If nothing matches, call the `not_found` function. :param environ: The HTTP application environment :param start_response: The application to run when the handling of the request is done :return: The response as a list of lines """

    path = environ.get("PATH_INFO", "").lstrip("/")
    logger.debug("<application> PATH: '%s'", path)

    if path == "metadata":
        return metadata(environ, start_response)

    logger.debug("Finding callback to run")
    try:
        for regex, spec in urls:
            match = re.search(regex, path)
            if match is not None:
                if isinstance(spec, tuple):
                    callback, func_name, _sp = spec
                    cls = callback(_sp, environ, start_response, cache=CACHE)
                    func = getattr(cls, func_name)
                    return func()
                else:
                    return spec(environ, start_response, SP)
        if re.match(".*static/.*", path):
            return handle_static(environ, start_response, path)
        return not_found(environ, start_response)
    except StatusError as err:
        logging.error("StatusError: %s" % err)
        resp = BadRequest("%s" % err)
        return resp(environ, start_response)
    except Exception as err:
        # _err = exception_trace("RUN", err)
        # logging.error(exception_trace("RUN", _err))
        print(err, file=sys.stderr)
        resp = ServiceError("%s" % err)
        return resp(environ, start_response)