Dfyjkt

I'm a bit inexperienced when it comes to Django's internals so I'm completely stuck now. It worked yesterday, and I can't remember I've changed anything significant.

When I turn DEBUG=True there is a stack trace on any module which happens to be first in the list

Traceback (most recent call last):
 File "/home/yury/PycharmProjects/mezzamine/findmeals/mezzamine/manage.py", line 28, in <module>
 execute_from_command_line(sys.argv)
 File "/usr/local/lib/python3.4/dist-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
 utility.execute()
 File "/usr/local/lib/python3.4/dist-packages/django/core/management/__init__.py", line 354, in execute
 django.setup()
 File "/usr/local/lib/python3.4/dist-packages/django/__init__.py", line 18, in setup
 from django.utils.log import configure_logging
 File "/usr/local/lib/python3.4/dist-packages/django/utils/log.py", line 13, in <module>
 from django.views.debug import ExceptionReporter, get_exception_reporter_filter
 File "/usr/local/lib/python3.4/dist-packages/django/views/debug.py", line 10, in <module>
 from django.http import (HttpResponse, HttpResponseServerError,
 File "/usr/local/lib/python3.4/dist-packages/django/http/__init__.py", line 4, in <module>
 from django.http.response import (
 File "/usr/local/lib/python3.4/dist-packages/django/http/response.py", line 13, in <module>
 from django.core.serializers.json import DjangoJSONEncoder
 File "/usr/local/lib/python3.4/dist-packages/django/core/serializers/__init__.py", line 23, in <module>
 from django.core.serializers.base import SerializerDoesNotExist
 File "/usr/local/lib/python3.4/dist-packages/django/core/serializers/base.py", line 6, in <module>
 from django.db import models
 File "/usr/local/lib/python3.4/dist-packages/django/db/__init__.py", line 98, in <module>
 signals.request_started.connect(reset_queries)
 File "/usr/local/lib/python3.4/dist-packages/django/dispatch/dispatcher.py", line 99, in connect
 argspec = inspect.getargspec(receiver)
 AttributeError: 'module' object has no attribute 'getargspec'

And when I turn DEBUG=False it complains about

Traceback (most recent call last):
 File "/home/yury/PycharmProjects/mezzamine/findmeals/mezzamine/manage.py", line 28, in <module>
 execute_from_command_line(sys.argv)
 File "/usr/local/lib/python3.4/dist-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
 utility.execute()
 File "/usr/local/lib/python3.4/dist-packages/django/core/management/__init__.py", line 354, in execute
 django.setup()
 File "/usr/local/lib/python3.4/dist-packages/django/__init__.py", line 18, in setup
 from django.utils.log import configure_logging
 File "/usr/local/lib/python3.4/dist-packages/django/utils/log.py", line 13, in <module>
 from django.views.debug import ExceptionReporter, get_exception_reporter_filter
 File "/usr/local/lib/python3.4/dist-packages/django/views/debug.py", line 10, in <module>
 from django.http import (HttpResponse, HttpResponseServerError,
 File "/usr/local/lib/python3.4/dist-packages/django/http/__init__.py", line 4, in <module>
 from django.http.response import (
 File "/usr/local/lib/python3.4/dist-packages/django/http/response.py", line 13, in <module>
 from django.core.serializers.json import DjangoJSONEncoder
 File "/usr/local/lib/python3.4/dist-packages/django/core/serializers/__init__.py", line 23, in <module>
 from django.core.serializers.base import SerializerDoesNotExist
 File "/usr/local/lib/python3.4/dist-packages/django/core/serializers/base.py", line 6, in <module>
 from django.db import models
 File "/usr/local/lib/python3.4/dist-packages/django/db/models/__init__.py", line 8, in <module>
 from django.db.models.manager import Manager # NOQA
 File "/usr/local/lib/python3.4/dist-packages/django/db/models/manager.py", line 63, in <module>
 class BaseManager(six.with_metaclass(RenameManagerMethods)):
 File "/usr/local/lib/python3.4/dist-packages/django/utils/six.py", line 778, in __new__
 return meta(name, bases, d)
 File "/usr/local/lib/python3.4/dist-packages/django/utils/deprecation.py", line 50, in __new__
 for base in inspect.getmro(new_class):
 AttributeError: 'module' object has no attribute 'getmro'

I use Django 1.7.8 and Mezzanine 3 and tried upgrading and reinstalling them with no luck. Could anyone give a hint on what's wrong?

You have a local file called "inspect.py" that is shadowing the stdlib module. Name your file something else.

django/utils/inspect.pyc is shadowing standard library inspect.py

django/utils/inspect.py was added in Django 1.9 and compiled binary file is left after you downgraded to 1.7.8