Flask 日志记录 - 无法将其写入文件 [英] Flask logging - Cannot get it to write to a file

问题描述

好的，这是我设置所有内容的代码:

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')

发生了什么

1. error.log 被创建
2. 没有写入任何内容
3. 尽管没有添加 StreamHandler 并将 debug 设置为 false，我仍然将所有内容都设置为 STDOUT(这可能是正确的，但仍然看起来很奇怪)

我是不是完全离开了这里或发生了什么?

Am I totally off here somewhere or what is happening?

推荐答案

为什么不这样做:

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")

如果您现在启动应用程序，您将看到 error.log 包含:

If you now start you application, you'll see that error.log contains:

INFO:werkzeug: * Running on http://0.0.0.0:5000/

有关更多信息，请访问 http://docs.python.org/2/howto/logging.html

For more info, visit http://docs.python.org/2/howto/logging.html

好的，因为您坚持认为我向您展示的方法不能有两个处理程序，我将添加一个示例，使这一点非常清楚.首先，将此日志代码添加到您的主要:

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')))

现在还添加一些调试代码，以便我们看到我们的设置有效:

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")

剩下的就是logging.conf"程序.让我们使用它:

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]

这个配置比需要的更复杂，但它也显示了日志模块的一些功能.

This config is more complicated than needed, but it also shows some features of the logging module.

现在，当我们运行我们的应用程序时，我们会看到这个输出(werkzeug- 和 console-logger):

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/

另请注意，使用了带有HI"的自定义格式化程序.

Also note that the custom formatter with the "HI" was used.

现在查看errors.log"文件.它包含:

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Flask 日志记录 - 无法将其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！