ValueError: Unable to configure handler 'file': [Errno 2] No such file or directory:

Question

I am very new to Python and Django and is currently busy learning myself through tutorials on www.djangoproject.com. I am using PyCharm and working on OS X El Capitan. I have imported a project from github and created a virtual environment for the project interpretor based on Python 3.5.1. In the vm I installed django.

I then activated the vm.

Now.. i started by trying to execute simple commands in the terminal like python manage.py startapp deonapp and python manage.py runserver but each time I get an error which I pasted below.. What did I miss? I cannot seem to find the /log/ directory?

Traceback (most recent call last):
  File "/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5/logging/config.py", line 558, in configure
    handler = self.configure_handler(handlers[name])
  File "/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5/logging/config.py", line 731, in configure_handler
    result = factory(**kwargs)
  File "/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5/logging/__init__.py", line 1008, in __init__
    StreamHandler.__init__(self, self._open())
  File "/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5/logging/__init__.py", line 1037, in _open
    return open(self.baseFilename, self.mode, encoding=self.encoding)
FileNotFoundError: [Errno 2] No such file or directory: '/Users/deon/Documents/PyCharmProjects/Developments/deonproject/log/debug.log'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/Users/deon/Documents/PyCharmProjects/Developments/deonproject/venv/lib/python3.5/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line
    utility.execute()
  File "/Users/deon/Documents/PyCharmProjects/Developments/deonproject/venv/lib/python3.5/site-packages/django/core/management/__init__.py", line 341, in execute
    django.setup()
  File "/Users/deon/Documents/PyCharmProjects/Developments/deonproject/venv/lib/python3.5/site-packages/django/__init__.py", line 22, in setup
    configure_logging(settings.LOGGING_CONFIG, settings.LOGGING)
  File "/Users/deon/Documents/PyCharmProjects/Developments/deonproject/venv/lib/python3.5/site-packages/django/utils/log.py", line 75, in configure_logging
    logging_config_func(logging_settings)
  File "/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5/logging/config.py", line 795, in dictConfig
    dictConfigClass(config).configure()
  File "/usr/local/Cellar/python3/3.5.1/Frameworks/Python.framework/Versions/3.5/lib/python3.5/logging/config.py", line 566, in configure
    '%r: %s' % (name, e))
ValueError: Unable to configure handler 'file': [Errno 2] No such file or directory: '/Users/deon/Documents/PyCharmProjects/Developments/deonproject/log/debug.log'

Solution 1

You do not have path to a log file for some reason (/Users/deon/Documents/PyCharmProjects/Developments/deonproject/log). Make sure that all directories exist (if no, create them) and create an empty debug.log log file (just in case).

What happens is there is some problem with your code happening. Handler catches this error to save it to your log file so that you can analyze it. However, the path to log file it is trying to open does not exist. Thus, exception occures during handling of another exception.

Solution 2

In case someone get it useful: In my case the error was triggered by a permissions issue. Once i change permissions and let app user write in folder this was solved.

Comments

[Deon Van Zyl]

aha, thanks! I added the path and empty file and it now goes past the error onto a next one django.core.exceptions.ImproperlyConfigured: Error loading psycopg2 module: No module named 'psycopg2' :) any thoughts?

[Łukasz Rogalski]

Yes, psycopg2 is not installed (...)