烧瓶记录根本不起作用 [英] Flask logging not working at all

问题描述

我正在尝试将Flask中的消息记录到文件和标准输出中.我一直在阅读Flask的官方文档，并提出了以下建议:

I'm trying to log messages in Flask both to file and to stdout. I've been reading the official Flask docs and came up with this:

from flask import Flask
import logging
from logging import Formatter, FileHandler

app = Flask(__name__)



@app.route('/')
def hello_world():
    app.logger.debug('second test message...')
    return 'Hello World!'


if __name__ == '__main__':
    #Setup the logger
    file_handler = FileHandler('output.log')
    handler = logging.StreamHandler()
    file_handler.setLevel(logging.DEBUG)
    handler.setLevel(logging.DEBUG)
    file_handler.setFormatter(Formatter(
        '%(asctime)s %(levelname)s: %(message)s '
        '[in %(pathname)s:%(lineno)d]'
     ))
     handler.setFormatter(Formatter(
        '%(asctime)s %(levelname)s: %(message)s '
        '[in %(pathname)s:%(lineno)d]'
     ))
     app.logger.addHandler(handler)
     app.logger.addHandler(file_handler)
     app.logger.error('first test message...')
     app.run()

有几个问题:

1. 没有生成output.log文件

2. 只有第一条记录消息有效:

1. No output.log file is generated

2. Only the first logging message works:

app.logger.error('testing ...')

app.logger.error('testing...')

而且仅在stdout中...视图"/"中的那个甚至不打印到stdout ...我在做错什么吗?

And only in stdout...the one in the view "/" does not even print to stdout... am I doing something wrong?

这是启动应用程序并转到/:

This is the output from starting the app and going to /:

2015-03-08 11:33:27,183 ERROR: first test message... [in /home/mosquito/python_projects/flask_tst/flask_tst.py:31]
* Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
127.0.0.1 - - [08/Mar/2015 11:33:43] "GET / HTTP/1.1" 200 -

推荐答案

由于您不在调试模式下运行，因此Flask会抑制您的(调试)日志记录消息.如果将以下标志设置为True，则代码将起作用.

Your (debug) logging messages are getting suppressed by Flask as you're not running in debug mode. If you set the following flag to True, your code will work.

    app.run(debug=True)

消息现在将按预期显示.

The messages will now appear as expected.

BennyE$ python3 stackoverflow.py 
2015-03-08 12:04:04,650 ERROR: firs test message... [in stackoverflow.py:31]
 * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)
 * Restarting with stat
2015-03-08 12:04:04,807 ERROR: firs test message... [in stackoverflow.py:31]
--------------------------------------------------------------------------------
DEBUG in stackoverflow [stackoverflow.py:11]:
second test message...
--------------------------------------------------------------------------------
2015-03-08 12:04:13,789 DEBUG: second test message... [in stackoverflow.py:11]
192.168.178.23 - - [08/Mar/2015 12:04:13] "GET / HTTP/1.1" 200 -
--------------------------------------------------------------------------------
DEBUG in stackoverflow [stackoverflow.py:11]:
second test message...
--------------------------------------------------------------------------------
2015-03-08 12:04:14,899 DEBUG: second test message... [in stackoverflow.py:11]
192.168.178.23 - - [08/Mar/2015 12:04:14] "GET / HTTP/1.1" 200 -

这是关联的输出文件中的输出:

This is the output in the associated output file:

BennyE$ cat output.log 
2015-03-08 11:58:22,226 ERROR: firs test message... [in stackoverflow.py:31]
2015-03-08 12:04:04,650 ERROR: firs test message... [in stackoverflow.py:31]
2015-03-08 12:04:04,807 ERROR: firs test message... [in stackoverflow.py:31]
2015-03-08 12:04:13,789 DEBUG: second test message... [in stackoverflow.py:11]
2015-03-08 12:04:14,899 DEBUG: second test message... [in stackoverflow.py:11]

这篇关于烧瓶记录根本不起作用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！