AttributeError: 'module' object has no attribute 'getmro'

I try to start a python app and after many problems with dependencies I got into another problem. After googling for a few hours I turned to my fav site for answers python manage.py runserver gives: Traceback (most recent call last): File "manage.py", line 10, in <module> execute_from_command_line(sys.argv) File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line utility.execute() File "/Library/Python/2.7/site-packages/django/core/management/__init__.py", line 303, in execute settings.INSTALLED_APPS File "/Library/Python/2.7/site-packages/django/conf/__init__.py", line 48, in __getattr__ self._setup(name) File "/Library/Python/2.7/site-packages/django/conf/__init__.py", line 44, in _setup self._wrapped = Settings(settings_module) File "/Library/Python/2.7/site-packages/django/conf/__init__.py", line 92, in __init__ mod = importlib.import_module(self.SETTINGS_MODULE) File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module __import__(name) File "/Users/bianca/other/DreamCatcher/dreamcatcher/__init__.py", line 1, in <module> from .celery_dreamcatcher import app as celery_app File "/Users/bianca/other/DreamCatcher/dreamcatcher/celery_dreamcatcher.py", line 4, in <module> from django.utils.log import logging File "/Library/Python/2.7/site-packages/django/utils/log.py", line 16, in <module> from django.views.debug import ExceptionReporter, get_exception_reporter_filter File "/Library/Python/2.7/site-packages/django/views/debug.py", line 9, in <module> from django.core.urlresolvers import Resolver404, resolve File "/Library/Python/2.7/site-packages/django/core/urlresolvers.py", line 18, in <module> from django.http import Http404 File "/Library/Python/2.7/site-packages/django/http/__init__.py", line 4, in <module> from django.http.response import ( File "/Library/Python/2.7/site-packages/django/http/response.py", line 13, in <module> from django.core.serializers.json import DjangoJSONEncoder File "/Library/Python/2.7/site-packages/django/core/serializers/__init__.py", line 24, in <module> from django.core.serializers.base import SerializerDoesNotExist File "/Library/Python/2.7/site-packages/django/core/serializers/base.py", line 6, in <module> from django.db import models File "/Library/Python/2.7/site-packages/django/db/models/__init__.py", line 6, in <module> from django.db.models.query import Q, QuerySet, Prefetch # NOQA File "/Library/Python/2.7/site-packages/django/db/models/query.py", line 16, in <module> from django.db.models import sql File "/Library/Python/2.7/site-packages/django/db/models/sql/__init__.py", line 2, in <module> from django.db.models.sql.subqueries import * # NOQA File "/Library/Python/2.7/site-packages/django/db/models/sql/subqueries.py", line 9, in <module> from django.db.models.sql.query import Query File "/Library/Python/2.7/site-packages/django/db/models/sql/query.py", line 17, in <module> File "/Library/Python/2.7/site-packages/django/db/models/sql/query.py", line 17, in <module> from django.db.models.aggregates import Count File "/Library/Python/2.7/site-packages/django/db/models/aggregates.py", line 5, in <module> from django.db.models.expressions import Func, Value File "/Library/Python/2.7/site-packages/django/db/models/expressions.py", line 7, in <module> from django.db.models import fields File "/Library/Python/2.7/site-packages/django/db/models/fields/__init__.py", line 19, in <module> from django import forms File "/Library/Python/2.7/site-packages/django/forms/__init__.py", line 6, in <module> from django.forms.fields import * # NOQA File "/Library/Python/2.7/site-packages/django/forms/fields.py", line 57, in <module> class Field(six.with_metaclass(RenameFieldMethods, object)): File "/Library/Python/2.7/site-packages/django/utils/six.py", line 778, in __new__ return meta(name, bases, d) File "/Library/Python/2.7/site-packages/django/utils/deprecation.py", line 53, in __new__ for base in inspect.getmro(new_class): AttributeError: 'module' object has no attribute 'getmro' I searched but I could not find a file names inspect.py in the project. Any idea is much appreciated. Thanks! EDIT: mdfind inspect.pyc gives /Library/Python/2.7/site-packages/django/utils/inspect.pyc /System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/numpy/compat/_inspect.pyc /System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/inspect.pyc /System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/test/test_inspect.pyc /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/compat/_inspect.pyc /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/inspect.pyc /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/test/test_inspect.pyc EDIT: I removed python 2.6 but that does not save the problem.