python logging in django view causes TypeError

Question

I set the logging as below

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')

When a valuError occurs ,I get the following output

...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

Can somebody help me figure this out? Why do I get a TypeError?

using pdb,and including the following in getMessage(self) of python2.6/logging/init.py

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)

could you print the msg and self.args values? just go to the "/usr/lib/python2.6/logging/__init__.py" file, write "import pdb; pdb.set_trace(); print msg, self.args" in line 305 and run it again — Hassek
– Hassek, Commented Jun 21, 2012 at 5:46

Hassek · Accepted Answer · 2012-06-21 14:27:41Z

1

You should add to your logging message a %s value, so it would be like this:

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

I have used the logger in a different way also, just adding the message directly like this:

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

which seems to me a lot more straight foward.

About the pdb, it is a really nice way to debug your program, I recommend it 100% :)

answered Jun 21, 2012 at 14:27

Hassek

9,0256 gold badges51 silver badges59 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

python logging in django view causes TypeError

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related