How to configure Python logs

Configuration

Configuration tendency

• Only output to file

• Rotate by time, default is 7d

• Log format: only record necessary information

import logging
from logging.handlers import TimedRotatingFileHandler
from os import path
def init_log_config(
        filename: str,
        *,
        default_dir="/var/log",
        logformat: str = ("[%(levelname)s %(asctime)s %(process)d_%(threadName)s %(filename)s:%(lineno)s:%(funcName)s] "
                          "%(message)s"),
        loglevel: str = "warn",
        backup_count: int = 7,
        encoding="utf-8",
        delay=True,
):
    """
    :param filename: 文件名
    :param default_dir: 
    :param logformat: 
    :param loglevel: 
    :param backup_count: 
    :param encoding: 
    :param delay: 
    :return: 
    """
    levelint = {
        "debug": logging.DEBUG,
        "info": logging.INFO,
        "warn": logging.WARN,
        "error": logging.ERROR
    }[loglevel]
    if not filename.startswith("/"):
        filename = path.join(default_dir, filename)
    logging.basicConfig(
        format=logformat,
        level=levelint,
        handlers=[
            TimedRotatingFileHandler(
                filename,
                when="d",
                backupCount=backup_count,
                encoding=encoding,
                delay=delay,
            )
        ]
    )

Usage

• At the very beginning of the program Start initialization (I usually put it on the first line)

init_log_config("log1.log", loglevel="debug")
import os, sys

• Used in business

logging.info("Start Do something")

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