python登录django View 导致TypeError

Question

我将日志设置如下

import logging

logging.basicConfig(
    level = logging.DEBUG,
    format = '%(asctime)s %(levelname)s %(message)s',
)

logger = logging.getLogger('myapp.views')

def my_view(request):
    ...
    try:
        parse_file_using_regex(file):
        ...
    except IndexError as ie:
        logger.debug('content of file not proper:',ie)
    except ValueError as ve:
        logger.debug('caused value error')

当发生 valueError 时，我得到以下输出

...Traceback (most recent call last):
  File "/usr/lib/python2.6/logging/__init__.py", line 768, in emit
    msg = self.format(record)
  File "/usr/lib/python2.6/logging/__init__.py", line 648, in format
    return fmt.format(record)
  File "/usr/lib/python2.6/logging/__init__.py", line 436, in format
    record.message = record.getMessage()
  File "/usr/lib/python2.6/logging/__init__.py", line 306, in getMessage
    msg = msg % self.args
TypeError: not all arguments converted during string formatting
....Traceback (most recent call last):
  File "/usr/lib/python2.6/logging/__init__.py", line 768, in emit
    msg = self.format(record)
  File "/usr/lib/python2.6/logging/__init__.py", line 648, in format
    return fmt.format(record)
  File "/usr/lib/python2.6/logging/__init__.py", line 436, in format
    record.message = record.getMessage()
  File "/usr/lib/python2.6/logging/__init__.py", line 306, in getMessage
    msg = msg % self.args
TypeError: not all arguments converted during string formatting
2012-06-21 09:13:47,909 DEBUG caused value error

谁能帮我解决这个问题？为什么我会收到 TypeError？

使用pdb，在python2.6/logging/init.py的getMessage(self)中包含如下内容

import pdb
pdb.set_trace()
print msg,sef.args

...> /usr/lib/python2.6/logging/__init__.py(307)getMessage()
-> print msg,sef.args
(Pdb) msg
'parsing subtitle file:'
(Pdb) self.args
('/home/me/dev/python/django/myapp/media/testpath/testfile.srt',)
(Pdb) 

Answer 1

你应该在你的日志消息中添加一个 %s 值，所以它应该是这样的:

logger.debug('content of file not propper: %s', ie)

我也以不同的方式使用记录器，只是像这样直接添加消息:

logger.debug('content of file not propper: %s' % ie)

在我看来这更直接。

关于 pdb，它是调试程序的一种非常好的方式，我 100% 推荐它 :)