sys模块

sys.exit()

sys.argv

sys.path

logging模块

logging.basicConfig(

level= ,

format= ,

filename= ,

filemode= ,

)#无法同时在文件和屏幕输出

logging.debug

logging.info

logging.warning

logging.error

logging.critical

logger方法

logger_obj=logging.getlogger()#获取logger对象

fh=logging.FileHandler('logger_file.txt)#文件输出

ch=logging.StreamHandler()#屏幕输出

logger_obj.setLevel(logging.DEBUG)

formater=logging.Formatter()

fh.setFormatter(formater)

ch.setFormatter(formater)

logger_obj.addHandler(fh)

logger_obj.addHandler(ch)

logger_obj.info('info')

logger_obj.error('error')

logger_obj.critical('critical')

先序列化再编码

json.dumps()序列化

json.loads()反序列化

json.dump()

json.load()