human
Complete the below
def first_found(apps):

    ''''Serve the first application that does not response with 404 Not Found.
    If no application serves content, will respond with generic 404 Not Found.
    Args:
    apps: List of WSGI applications to search through.  Will serve the content
    of the first of these that does not return a 404 Not Found.  Applications
    in this list must not modify the environment or any objects in it if they
    do not match.  Applications that do not obey this restriction can create
    unpredictable results.
    Returns:
    Compound application that serves the contents of the first application that
    does not response with 404 Not Found.'
    '''
 ... Give me a the Python program you requested?
assistant
#Here is the Python program you requested.
    apps = tuple(apps)
    not_found = error(httplib.NOT_FOUND)
    def first_found_app(environ, start_response):
        'Compound    application    returned    from    the    first_found    function.'
        final_result = {}
        def first_found_start_response(status, response_headers):
            "Replacement    for    start_response    as    passed    in    to    first_found_app.\n\n                        Called    by    each    application    in    apps    instead    of    the    real    start    response.\n                        Checks    the    response    status,    and    if    anything    other    than    404,    sets    'status'\n                        and    'response_headers'    in    final_result.\n                        "
            status_match = _STATUS_PATTERN.match(status)
            assert status_match, ('Status    must    be    a    string    beginning    with    3    digit    number.    Found:    %s' % status)
            status_code = status_match.group(0)
            if (int(status_code) == httplib.NOT_FOUND):
                return
            final_result['status'] = status
            final_result['response_headers'] = response_headers
        for app in apps:
            response = app(environ, first_found_start_response)
            if final_result:
                start_response(final_result['status'], final_result['response_headers'])
                return response
        return not_found(environ, start_response)
    return first_found_app