utils.py 文件源码

def try_download(_path, _file, _url, _stale,):
    now = time()
    url = URLopener()
    file_exists = isfile(_path+_file) == True
    if file_exists:
        file_old = (getmtime(_path+_file) + _stale) < now
    if not file_exists or (file_exists and file_old):
        try:
            url.retrieve(_url, _path+_file)
            result = 'ID ALIAS MAPPER: \'{}\' successfully downloaded'.format(_file)
        except IOError:
            result = 'ID ALIAS MAPPER: \'{}\' could not be downloaded'.format(_file)
    else:
        result = 'ID ALIAS MAPPER: \'{}\' is current, not downloaded'.format(_file)
    url.close()
    return result

# LEGACY VERSION - MAKES A SIMPLE {INTEGER ID: 'CALLSIGN'} DICTIONARY