1.常用参数
- Level
设置了输出 level，系统便只会输出 level 数值大于或等于该 level 的的日志结果，例如我们设置了输出日志 level 为 INFO，那么输出级别大于等于 INFO 的日志，如 WARNING、ERROR 等，DEBUG 和 NOSET 级别的不会输出。
| 等级 | 数值 |
|---|
| CRITICAL | 50 |
| FATAL | 50 |
| ERROR | 40 |
| WARNING | 30 |
| WARN | 30 |
| INFO | 20 |
| DEBUG | 10 |
| NOTSET | 0 |
| 格式 | 意义 |
|---|
| %(levelno)s | 打印日志级别的数值 |
| %(levelname)s | 打印日志级别的名称。 |
| %(filename)s | 打印当前执行程序名 |
| %(pathname)s | 打印当前执行程序的路径，其实就是sys.argv[0]。 |
| %(funcName)s | 打印日志的当前函数 |
| %(lineno)d | 打印日志的当前行号 |
| %(asctime)s | 打印日志的时间 |
| %(thread)d | 打印线程ID |
| %(threadName)s | 打印线程名称 |
| %(process)d | 打印进程ID |
| %(processName)s | 打印进程名称 |
| %(module) | 打印模块名称 |
| %(message)s | 打印日志信息 |
２.Handler模式
import logging
logger = logging.getLogger('test.log_test')
def run():
logger.info('Core Info')
logger.debug('Core Debug')
logger.error('Core Error')
import logging
from logging.handlers import HTTPHandler
import sys
import libs.lib.log_test as log_test
#initial logger
logger = logging.getLogger("test")
logger.setLevel(level=logging.DEBUG)
# StreamHandler
stream_handler = logging.StreamHandler(sys.stdout)
stream_handler.setLevel(level=logging.DEBUG)
logger.addHandler(stream_handler)
# FileHandler
file_handler = logging.FileHandler('output.log')
file_handler.setLevel(level=logging.INFO)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
file_handler.setFormatter(formatter)
logger.addHandler(file_handler)
# HTTPHandler
# http_handler = HTTPHandler(host='localhost:8001', url='log', method='POST')
# logger.addHandler(http_handler)
# Log
logger.info('This is a log info')
logger.debug('Debugging')
logger.warning('Warning exists')
logger.info('Finish')
#catch exception
try:
result = 10 / 0
except Exception:
logger.error('Faild to get result', exc_info=True)
logger.exception('Faild to get result', exc_info=True)
log_test.run()
3. Config模式
version: 1
formatters:
brief:
format: "%(asctime)s - %(message)s"
simple:
format: "%(asctime)s - %(name)s - %(levelname)s - %(message)s"
handlers:
console:
class : logging.StreamHandler
formatter: brief
level : INFO
stream : ext://sys.stdout
file:
class : logging.FileHandler
formatter: simple
level: DEBUG
filename: debug.log
error:
class: logging.handlers.RotatingFileHandler
level: ERROR
formatter: simple
filename: error.log
maxBytes: 10485760
backupCount: 20
encoding: utf8
loggers:
main.core:
level: DEBUG
handlers: [console, file, error]
root:
level: DEBUG
handlers: [console]
import logging
logger = logging.getLogger('test.log_test')
def run():
logger.info('Core Info')
logger.debug('Core Debug')
logger.error('Core Error')
import logging
import libs.lib.log_test as log_test
import yaml
import logging.config
import os
def setup_logging(default_path='config.yaml', default_level=logging.INFO):
path = default_path
if os.path.exists(path):
with open(path, 'r', encoding='utf-8') as f:
config = yaml.load(f)
logging.config.dictConfig(config)
else:
logging.basicConfig(level=default_level)
def log():
logging.debug('Start')
logging.info('Exec')
logging.info('Finished')
if __name__ == '__main__':
yaml_path = 'E:\python_sample\libs\lib\config.yaml'
setup_logging(yaml_path)
log()
log_test.run()
