python脚本攻略之log日志

import logging
#初始化
logging.basicConfig(level = logging.INFO,format = '%(asctime)s - %(name)s - %(levelname)s - %(message)s')
#生成日志句柄
logger = logging.getLogger("wqbin")logger.info("Start print log")
logger.debug("Do something")
logger.warning("Something maybe fail.")
logger.info("Finish")

import logging
import time
import logging.handlers
#初始化设置
logging.basicConfig(level = logging.INFO,format='%(asctime)s|%(name)-12s: %(levelname)-8s %(message)s')
#创建
logger = logging.getLogger("wqbin")
logger.setLevel(logging.INFO)#创建handler
handler1=logging.FileHandler("base-log.log")
handler1.setLevel(logging.INFO)
formatter=logging.Formatter('%(asctime)s|%(name)-12s+ %(levelname)-8s++%(message)s')
handler1.setFormatter(formatter)handler2=logging.StreamHandler()
handler2.setLevel(logging.ERROR)logger.addHandler(handler1)
logger.addHandler(handler2)logger.info("info")
logger.warning("warning")
logger.error("error")
print('finish')

filename Specifies that a FileHandler be created, using the specified
filename, rather than a StreamHandler.
filemode Specifies the mode to open the file, if filename is specified
(if filemode is unspecified, it defaults to 'a').
format Use the specified format string for the handler.
datefmt Use the specified date/time format.
style If a format string is specified, use this to specify the
type of format string (possible values '%', '{', '$', for
%-formatting, :meth:`str.format` and :class:`string.Template`
- defaults to '%').
level Set the root logger level to the specified level.
stream Use the specified stream to initialize the StreamHandler. Note
that this argument is incompatible with 'filename' - if both
are present, 'stream' is ignored.
handlers If specified, this should be an iterable of already created
handlers, which will be added to the root handler. Any handler
in the list which does not have a formatter assigned will be
assigned the formatter created in this function.

%(levelno)s：打印日志级别的数值
%(levelname)s：打印日志级别的名称
%(pathname)s：打印当前执行程序的路径，其实就是sys.argv[0]
%(filename)s：打印当前执行程序名
%(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
%(message)s：打印日志信息

import time
import logging
import logging.handlers
import os# 如果日志文件夹不存在，则创建
log_dir = "log-day" # 日志存放文件夹名称
log_path = os.getcwd() + os.sep + log_dir
if not os.path.isdir(log_path):
os.makedirs(log_path)# logging初始化工作
logging.basicConfig()# myapp的初始化工作
myapp = logging.getLogger('myapp')
myapp.setLevel(logging.INFO)# 添加TimedRotatingFileHandler
# 定义一个1天换一次log文件的handler
# 保留3个旧log文件
timefilehandler = logging.handlers.TimedRotatingFileHandler(
log_dir + os.sep + "sec.log",
when='M',
interval=1,
backupCount=3
)
# 设置后缀名称，跟strftime的格式一样
timefilehandler.suffix = "%Y-%m-%d_%H-%M-%S.log"
# timefilehandler.suffix = "%Y-%m-%d.log"formatter = logging.Formatter('%(asctime)s|%(name)-12s: %(levelname)-8s %(message)s')
timefilehandler.setFormatter(formatter)
myapp.addHandler(timefilehandler)while True:
time.sleep(6)
myapp.info("test")

import os
import time
import logging
import logging.handlerslog_dir = "log-day" # 日志存放文件夹名称
log_path = os.getcwd() + os.sep + log_dir
if not os.path.isdir(log_path):
os.makedirs(log_path)# logging初始化工作
logging.basicConfig()# myapp的初始化工作
myapp = logging.getLogger('myapp')
myapp.setLevel(logging.INFO)# 添加TimedRotatingFileHandler
# 定义一个1秒换一次log文件的handler
# 保留3个旧log文件
timefilehandler = logging.handlers.TimedRotatingFileHandler("log-day/myapp.log", when='S', interval=1, backupCount=3)
# 设置后缀名称，跟strftime的格式一样
timefilehandler.suffix = "%Y-%m-%d_%H-%M-%S.log"formatter = logging.Formatter('%(asctime)s|%(name)-12s: %(levelname)-8s %(message)s')
timefilehandler.setFormatter(formatter)
myapp.addHandler(timefilehandler)while True:
time.sleep(0.1)
myapp.info("test")

import os
import time
import logging
import logging.handlerslog_dir = "log-day" # 日志存放文件夹名称
log_path = os.getcwd() + os.sep + log_dir
if not os.path.isdir(log_path):
os.makedirs(log_path)
# logging初始化工作
logging.basicConfig()# myapp的初始化工作
myapp = logging.getLogger('myDemo')
myapp.setLevel(logging.INFO)# 写入文件，如果文件超过100个Bytes，仅保留5个文件。
handler = logging.handlers.RotatingFileHandler(
'log-day/myDemo.log', maxBytes=500, backupCount=5)formatter = logging.Formatter('%(asctime)s|%(name)-12s: %(levelname)-8s %(message)s')
handler.setFormatter(formatter)
# 设置后缀名称，跟strftime的格式一样
myapp.addHandler(handler)while True:
time.sleep(0.1)
myapp.info("file test")

import logging
logger = logging.getLogger(__name__)
logger.setLevel(level = logging.INFO)
handler = logging.FileHandler("log-day/log.txt")
handler.setLevel(logging.INFO)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
handler.setFormatter(formatter)console = logging.StreamHandler()
console.setLevel(logging.INFO)logger.addHandler(handler)
logger.addHandler(console)logger.info("Start print log")
logger.debug("Do something")
logger.warning("Something maybe fail.")
try:
open("log-day/sklearn.txt","rb")
except (SystemExit,KeyboardInterrupt):
raise
except Exception:
logger.error("Faild to open sklearn.txt from logger.error",exc_info = True)logger.info("Finish")