title: Django runserver ImportError
body: <p>I'm running Django 1.9 on python 3.4 in a virtualenv. It has been working, but today, it's not.</p>
  
  <p>When I run ./manage.py runserver, I get the following error:</p>
  
  <blockquote>
  <pre><code>(django1)dan@danvb:~/Share/django1/suorganizer$ ./manage.py runserver
  Performing system checks...
  
  System check identified no issues (0 silenced). Unhandled exception in
  thread started by &lt;function check_errors.&lt;locals&gt;.wrapper at
  0x7f48a01d2c80&gt; Traceback (most recent call last):   File
  "/home/dan/Share/django1/lib/python3.4/site-packages/django/utils/autoreload.py",
  line 226, in wrapper
      fn(*args, **kwargs)   File "/home/dan/Share/django1/lib/python3.4/site-packages/django/core/management/commands/runserver.py",
  line 117, in inner_run
      self.check_migrations()   File "/home/dan/Share/django1/lib/python3.4/site-packages/django/core/management/commands/runserver.py",
  line 163, in check_migrations
      executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])   File "/home/dan/Share/django1/lib/python3.4/site-packages/django/db/migrations/executor.py",
  line 20, in __init__
      self.loader = MigrationLoader(self.connection)   File "/home/dan/Share/django1/lib/python3.4/site-packages/django/db/migrations/loader.py",
  line 49, in __init__
      self.build_graph()   File "/home/dan/Share/django1/lib/python3.4/site-packages/django/db/migrations/loader.py",
  line 170, in build_graph
      self.load_disk()   File "/home/dan/Share/django1/lib/python3.4/site-packages/django/db/migrations/loader.py",
  line 105, in load_disk
      migration_module = import_module("%s.%s" % (module_name, migration_name))   File
  "/home/dan/Share/django1/lib/python3.4/importlib/__init__.py",
  line 109, in import_module
      return _bootstrap._gcd_import(name[level:], package, level)   File "&lt;frozen importlib._bootstrap&gt;", 
  line 2254, in _gcd_import   File "&lt;frozen importlib._bootstrap&gt;", 
  line 2237, in _find_and_load   File "&lt;frozen importlib._bootstrap&gt;", 
  line 2212, in _find_and_load_unlocked  File "&lt;frozen importlib._bootstrap&gt;",
  line 321, in _call_with_frames_removed   File "&lt;frozen importlib._bootstrap&gt;",
  line 2254, in _gcd_import   File "&lt;frozen importlib._bootstrap&gt;",
  line 2237, in _find_and_load   File "&lt;frozen importlib._bootstrap&gt;",
  line 2224, in _find_and_load_unlocked ImportError: No module named 'core.migrations.delete'
  </code></pre>
  </blockquote>
  
  <p>I uninstalled and reinstalled Django==1.9, and get the same error. In lib/python3.4/site-packages/django/core/, I don't have a migrations directory. I'm not sure what to look for. The command ./manage.py runserver worked for me on this project not so long ago.</p>
  
  <p>Thank you.</p>