烧瓶日志 - 无法写入文件 [英] Flask logging - Cannot get it to write to a file
问题描述
if __name__ =='__main__':
app .debug = False
applogger = app.logger
file_handler = FileHandler(error.log)
file_handler.setLevel(logging.DEBUG)
applogger.setLevel(logging.DEBUG)
applogger.addHandler(file_handler)
$ b app.run(host ='0.0.0.0')
会发生什么事情?
- error.log
-
-
-
- 尽管没有添加StreamHandler并将调试设置为false,但仍然将所有内容都设置为标准输出(可能是正确,但似乎很奇怪)
我完全离开这里或发生了什么?
<为什么不这样做:
if __name__ = ='__main__':
init_db()#或任何你需要做的事
impo rt logging
logging.basicConfig(filename ='error.log',level = logging.DEBUG)
app.run(host =0.0.0.0)
如果您现在启动应用程序,您将看到error.log包含:
INFO:werkzeug:*在http://0.0.0.0:5000/
上运行
有关更多信息,请访问 http://docs.python.org/2 / howto / logging.html
好的,因为你坚持说我不能给你看两个处理程序,所以我会添加一个例子这很清楚。首先,将这个日志代码添加到你的main:
import logging,logging.config,yaml
logging.config。 dictConfig(yaml.load(open('logging.conf')))
现在也添加一些调试代码,以便我们看到我们的安装程序工作:
$ pre $ log $ logLogger('file')
logconsole = logging.getLogger('console')
logfile.debug(Debug FILE)
logconsole.debug(Debug CONSOLE)
剩下的就是logging.conf程序。让我们使用:
版本:1
格式化程序:
hiformat:
format:' HI%(asctime)s - %(name)s - %(levelname)s - %(message)s'
simple:
格式:'%(asctime)s - %(name)s - %(levelname)s - %(message)s'
处理程序:
控制台:$ b $ class:logging.StreamHandler
级别:DEBUG
格式化程序:hiformat
stream:ext://sys.stdout
file:
class:logging.FileHandler
level:DEBUG
formatter:simple
filename:errors.log
loggers:
console:
level:DEBUG
handlers:[console]
propagate:no
file:
level:DEBUG
处理程序:[file]
propagate:no
root:
level:DEBUG
处理程序:[console,file]
这个配置比需要的更复杂,但它也显示了日志记录模块的一些功能。
现在,当我们运行我们的应用程序时,我们看到这个输出(w erkzeug-和console-logger):
HI 2013-07-22 16:36:13,475 - console - DEBUG - 调试控制台
HI 2013-07-22 16:36:13,477 - werkzeug - INFO - *在http://0.0.0.0:5000/
上运行
另请注意,使用了带HI的自定义格式化程序。
现在看一下errors.log文件。它包含:
2013-07-22 16:36:13,475 - 文件 - DEBUG - 调试文件
2013- 07-22 16:36:13,477 - werkzeug - INFO - *在http://0.0.0.0:5000/
上运行
Ok, here's the code where I setup everything:
if __name__ == '__main__':
app.debug = False
applogger = app.logger
file_handler = FileHandler("error.log")
file_handler.setLevel(logging.DEBUG)
applogger.setLevel(logging.DEBUG)
applogger.addHandler(file_handler)
app.run(host='0.0.0.0')
What happens is
- error.log gets created
- Nothing is ever written to it
- Despite not adding a StreamHandler and setting debug to false I still get everything to STDOUT (this might be correct, but still seems weird)
Am I totally off here somewhere or what is happening?
Why not do it like this:
if __name__ == '__main__':
init_db() # or whatever you need to do
import logging
logging.basicConfig(filename='error.log',level=logging.DEBUG)
app.run(host="0.0.0.0")
If you now start you application, you'll see that error.log contains:
INFO:werkzeug: * Running on http://0.0.0.0:5000/
For more info, visit http://docs.python.org/2/howto/logging.html
Okay, as you insist that you cannot have two handler with the method I showed you, I'll add an example that makes this quite clear. First, add this logging code to your main:
import logging, logging.config, yaml
logging.config.dictConfig(yaml.load(open('logging.conf')))
Now also add some debug code, so that we see that our setup works:
logfile = logging.getLogger('file')
logconsole = logging.getLogger('console')
logfile.debug("Debug FILE")
logconsole.debug("Debug CONSOLE")
All what is left is the "logging.conf" program. Let's use that:
version: 1
formatters:
hiformat:
format: 'HI %(asctime)s - %(name)s - %(levelname)s - %(message)s'
simple:
format: '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
handlers:
console:
class: logging.StreamHandler
level: DEBUG
formatter: hiformat
stream: ext://sys.stdout
file:
class: logging.FileHandler
level: DEBUG
formatter: simple
filename: errors.log
loggers:
console:
level: DEBUG
handlers: [console]
propagate: no
file:
level: DEBUG
handlers: [file]
propagate: no
root:
level: DEBUG
handlers: [console,file]
This config is more complicated than needed, but it also shows some features of the logging module.
Now, when we run our application, we see this output (werkzeug- and console-logger):
HI 2013-07-22 16:36:13,475 - console - DEBUG - Debug CONSOLE
HI 2013-07-22 16:36:13,477 - werkzeug - INFO - * Running on http://0.0.0.0:5000/
Also note that the custom formatter with the "HI" was used.
Now look at the "errors.log" file. It contains:
2013-07-22 16:36:13,475 - file - DEBUG - Debug FILE
2013-07-22 16:36:13,477 - werkzeug - INFO - * Running on http://0.0.0.0:5000/
这篇关于烧瓶日志 - 无法写入文件的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!