python记录器不写入文件

Question

i write this logger

import logging

class ThreadLogger:
    def __init__(self):
        self.logger = logging.getLogger("ThreadsLogging")
        f_handler = logging.FileHandler("logs/thread.log", mode="a")
        f_handler.setLevel(logging.INFO)
        f_format = logging.Formatter('%(name)s - %(levelname)s - %(message)s')
        f_handler.setFormatter(f_format)
        self.logger.addHandler(f_handler)

    def info_log(self, msg):
        self.logger.info(msg)

But after call info_log(msg) file threads.log is empty. I change and delete mode in FileHandler but it dosen't help me

Answer 1

Handlers and loggers both can have levels. You didn't set the level on the logger. Add self.logger.setLevel(logging.INFO) inside of your __init__ and it will work.