How to use the mediacloud.api.MediaCloud function in mediacloud

def _sentence_numfound(api_key, keywords, media, start, end):
    user_mc = mcapi.MediaCloud(api_key)
    query = "%s AND (%s)" % (keywords, app.util.media_to_solr(media))
    start = datetime.datetime.strptime(start, '%Y-%m-%d').strftime('%Y-%m-%d')
    end = datetime.datetime.strptime(end, '%Y-%m-%d').strftime('%Y-%m-%d')
    response = user_mc.sentenceCount(query, solr_filter='', split=True, split_daily=True, split_start_date=start, split_end_date=end)
    del response['split']['gap']
    del response['split']['start']
    del response['split']['end']
    date_counts = []
    for date, num_found in response['split'].iteritems():
        date_counts.append({
            "date": date[:10]
            , "numFound": num_found
        })
    date_counts = sorted(date_counts, key=lambda d: datetime.datetime.strptime(d["date"], "%Y-%m-%d"))
    return json.dumps(date_counts, separators=(',',':'))

def _get_user_mc(api_key, force_admin=False):
    if force_admin or (api_key == app_mc_key):
        return mcapi.AdminMediaCloud(api_key)
    return mcapi.MediaCloud(api_key)

def main():

    # first backup the old file
    json_file_path = os.path.join(OUTPUT_DIR, OUTPUT_FILE)
    backup_json_path = os.path.join(OUTPUT_DIR, BACKUP_OUTPUT_FILE)
    if os.path.exists(json_file_path):
        print('Backing up old media.json')
        shutil.copyfile(json_file_path,backup_json_path)

    # connect to mediacloud
    config = ConfigParser.ConfigParser()
    config.read( CONFIG_FILE )
    mc = mediacloud.api.MediaCloud(config.get('mediacloud','key'))
    
    # page through sources
    print " "
    print "Fetching Sources:"
    sources = []
    current = 0
    more_rows = True
    while more_rows:
        print "  At "+str(current)
        media_list = mc.mediaList(current,ITEMS_PER_PAGE)
        public_media_list = []
        for media in media_list:
            public_tags = [t for t in media['media_source_tags'] if t['show_on_media']==1 or t['show_on_stories']==1]
            if len(public_tags)>0:
                public_media_list.append(media)
        [ sources.append( {'media_id': m['media_id'], 'name': m['name'], 'url': m['url'] } )

def sentences(keywords, media, start, end):
    user_mc = mcapi.MediaCloud(flask_login.current_user.get_id())
    query = app.util.solr_query(app.util.media_to_solr(media), start, end)
    res = user_mc.sentenceList("%s AND (%s)" % (keywords, query), '', 0, 10)
    return json.dumps(res, separators=(',',':'))

def _sentence_numfound(api_key, keywords, media, start, end):
    user_mc = mcapi.MediaCloud(api_key)
    query = "%s AND (%s)" % (keywords, app.util.media_to_solr(media))
    start = datetime.datetime.strptime(start, '%Y-%m-%d').strftime('%Y-%m-%d')
    end = datetime.datetime.strptime(end, '%Y-%m-%d').strftime('%Y-%m-%d')
    response = user_mc.sentenceCount(query, solr_filter='', split=True, split_daily=True, split_start_date=start, split_end_date=end)
    del response['split']['gap']
    del response['split']['start']
    del response['split']['end']
    date_counts = []
    for date, num_found in response['split'].iteritems():
        date_counts.append({
            "date": date[:10]
            , "numFound": num_found
        })
    date_counts = sorted(date_counts, key=lambda d: datetime.datetime.strptime(d["date"], "%Y-%m-%d"))
    return json.dumps(date_counts, separators=(',',':'))