recipe-573471.py 文件源码

def fetch_quote(symbols, timestamp, cached_file=None):
    url = URL % '+'.join(symbols)

    if not cached_file:
        # fetch
        log('Fetching %s' % url)
        fp = urllib.urlopen(url)
        try:
            data = fp.read()
        finally:
            fp.close()

        # log result
        if LOG_DATA_FETCHED:
            log_filename = LOG_FILENAME % timestamp.replace(':','-')
            out = open(log_filename, 'wb')
            try:
                log('Fetched %s bytes logged in %s' % (len(data), log_filename))
                out.write(data)
            finally:
                out.close()
    else:
        data = open(cached_file,'rb').read()

    return StringIO(data)