loguru库使用

参考：

https://github.com/Delgan/loguru

https://loguru.readthedocs.io/en/stable/overview.html

https://blog.csdn.net/Kangyucheng/article/details/112794185

Loguru是一个高效打印Log的库，试用后你会喜欢上它的。

安装

pip install loguru

直接使用

输出等级 DEBUG、INFO、WARNING、ERROR、CRITICAL

logger.debug("That's it, beautiful and simple logging!")
logger.info("That's it, beautiful and simple logging!")
logger.warning("That's it, beautiful and simple logging!")
logger.error("That's it, beautiful and simple logging!")
logger.critical("That's it, beautiful and simple logging!")

add函数

将日志输出到了log.txt文件中。

logger.add(sink='log.txt', format="{time} {level} {message}", filter="my_module", level="INFO")

使用参数对保存日志进行操作

logger.add("file_1.log", rotation="500 MB")    # Automatically rotate too big file
logger.add("file_2.log", rotation="12:00")     # New file is created each day at noon
logger.add("file_X.log", retention="10 days")  # Cleanup after some time
logger.add("file_Y.log", compression="zip")    # Save some loved space

支持{}变量

logger.info("If you're using Python {}, prefer {feature} of course!", 3.6, feature="f-strings")

修改时间格式

logger.add("file.log", format="{time:YYYY-MM-DD at HH:mm:ss} | {level} | {message}")

只保存文件，不在console中输出

logger.remove(handler_id = None) # 清除之前的设置

记录到两个日志文件中

根据filter来进行区分logger的，再用logger.bind()来做logger的区分。

logger.add("gui.log",filter = lambda record:record["extra"]["name"]=="gui_log") # 向gui.log中保存["name"]="gui_log"的log文件
logger.add("serial.log",filter = lambda record:record["extra"]["name"]=="serial_log") # 向serial.log中保存["name"]="serial_log"的log文件
logger_gui = logger.bind(name="gui_log") # 添加 ["name"]的属性
logger_serial = logger.bind(name="serial_log") # 添加 ["name"]的属性
logger_gui.info("guis")
logger_serial.info("serial")

按照日志等级记录到不同文件

logger.add("info.log",level = "INFO",filter=lambda x: 'INFO' in str(x['level']).upper()
logger.add("error.log",level = "ERROR",filter=lambda x: 'ERROR' in str(x['level']).upper()