human
Complete the below
def appstats_wsgi_middleware(app):

    ''''WSGI Middleware to install the instrumentation.
    Normally you specify this middleware in your appengine_config.py
    file, like this:
    def webapp_add_wsgi_middleware(app):
    from google.appengine.ext.appstats import recording
    app = recording.appstats_wsgi_middleware(app)
    return app
    See Python PEP 333, http://www.python.org/dev/peps/pep-0333/ for
    more information about the WSGI standard.'
    '''
 ... Write me a the Python code you requested?
assistant
#Here is the Python code you requested.
    def appstats_wsgi_wrapper(environ, start_response):
        'Outer    wrapper    function    around    the    WSGI    protocol.\n\n                The    top-level    appstats_wsgi_middleware()    function    returns    this\n                function    to    the    caller    instead    of    the    app    class    or    function    passed\n                in.        When    the    caller    calls    this    function    (which    may    happen\n                multiple    times,    to    handle    multiple    requests)    this    function\n                instantiates    the    app    class    (or    calls    the    app    function),    sandwiched\n                between    calls    to    start_recording()    and    end_recording()    which\n                manipulate    the    recording    state.\n\n                The    signature    is    determined    by    the    WSGI    protocol.\n                '
        start_recording(environ)
        save_status = [None]
        datamodel_pb.AggregateRpcStatsProto.total_billed_ops_str = total_billed_ops_to_str
        datamodel_pb.IndividualRpcStatsProto.billed_ops_str = individual_billed_ops_to_str
        def appstats_start_response(status, headers, exc_info=None):
            "Inner    wrapper    function    for    the    start_response()    function    argument.\n\n                        The    purpose    of    this    wrapper    is    save    the    HTTP    status    (which    the\n                        WSGI    protocol    only    makes    available    through    the    start_response()\n                        function)    into    the    surrounding    scope.        This    is    done    through    a\n                        hack    because    Python    2.x    doesn't    support    assignment    to    nonlocal\n                        variables.        If    this    function    is    called    more    than    once,    the    last\n                        status    value    will    be    used.\n\n                        The    signature    is   ...