human
Complete the below
def gauge():

    ''''Flood Gauges, RESTful controller'
    '''
assistant
#Here is the Python program you requested.
    def prep(r):
        if r.interactive:
            pass
        elif (r.representation == 'plain'):
            r.table.image_url.readable = False
        return True
    s3.prep = prep
    def postp(r, output):
        if r.interactive:
            pass
        elif (r.representation == 'plain'):
            image_url = r.record.image_url
            if image_url:
                output['item'].append(IMG(_src=image_url, _width=400, _height=310))
        return output
    s3.postp = postp
    output = s3_rest_controller()
    return output