如下所示：
import logging
# 创建一个logger
logger = logging.getLogger('mylogger')
logger.setLevel(logging.DEBUG)
# 创建一个handler，用于写入日志文件
fh = logging.FileHandler('test.log')
fh.setLevel(logging.DEBUG)
# 再创建一个handler，用于输出到控制台
ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)
# 定义handler的输出格式
formatter = logging.Formatter('[%(asctime)s][%(thread)d][%(filename)s][line: %(lineno)d][%(levelname)s] ## %(message)s')
fh.setFormatter(formatter)
ch.setFormatter(formatter)
# 给logger添加handler
logger.addHandler(fh)
logger.addHandler(ch)
# 记录一条日志
logger.info('foorbar')
关于formatter的配置，采用的是%()s的形式，就是字典的关键字替换。提供的关键字包括：
Format
Description
%(name)s
Name of the logger (logging channel).
%(levelno)s
Numeric logging level for the message (DEBUG, INFO, WARNING, ERROR, CRITICAL).
%(levelname)s
Text logging level for the message ('DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL').
%(pathname)s
Full pathname of the source file where the logging call was issued (if available).
%(filename)s
Filename portion of pathname.
%(module)s
Module (name portion of filename).
%(funcName)s
Name of function containing the logging call.
%(lineno)d
Source line number where the logging call was issued (if available).
%(created)f
Time when the LogRecord was created (as returned by time.time()).
%(relativeCreated)d
Time in milliseconds when the LogRecord was created, relative to the time the logging module was loaded.
%(asctime)s
Human-readable time when the LogRecord was created. By default this is of the form “-07-08 16:49:45,896” (the numbers after the comma are millisecond portion of the time).
%(msecs)d
Millisecond portion of the time when the LogRecord was created.
%(thread)d
Thread ID (if available).
%(threadName)s
Thread name (if available).
%(process)d
Process ID (if available).
%(message)s
The logged message, computed as msg % args.
以上这篇python 通过logging写入日志到文件和控制台的实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持我们。
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时间： -04-26
