title: SyntaxError: Generator expression must be parenthezised / python manage.py migrate
body: <p>I'm really new in programming and I wanted to follow the Djangogirls tutorial, but I'm stucked now.
  In the tutorial, I am <a href="https://tutorial.djangogirls.org/en/django_start_project/" rel="noreferrer">here</a>:</p>
  
  <blockquote>
    <p>To create a database for our blog, let's run the following in the console: python manage.py migrate (we need to be in the djangogirls directory that contains the manage.py file). If that goes well, you should see something like this: ...</p>
  </blockquote>
  
  <p>There is no option to fail in the tutorial but I have an error message:</p>
  
  <pre><code>(myvenv) C:\Users\Julcsi\djangogirls&gt; python manage.py migrate
  Traceback (most recent call last):
  File "manage.py", line 22, in &lt;module&gt;
  execute_from_command_line(sys.argv)
  File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\core\management\__init__.py", 
  line 364, in execute_from_command_line
  utility.execute()
  File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\core\management\__init__.py", 
  line 338, in execute
  django.setup()
  File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\__init__.py", 
  line 27, in setup
  apps.populate(settings.INSTALLED_APPS)
  File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\apps\registry.py", 
  line 85, in populate
  app_config = AppConfig.create(entry)
  File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\apps\config.py", 
  line 94, in create
  module = import_module(entry)
  File "C:\Users\Julcsi\AppData\Local\Programs\Python\Python37\lib\importlib\__init__.py", 
  line 127, in import_module
  return _bootstrap._gcd_import(name[level:], package, level)
  File "&lt;frozen importlib._bootstrap&gt;", line 994, in _gcd_import
  File "&lt;frozen importlib._bootstrap&gt;", line 971, in _find_and_load
  File "&lt;frozen importlib._bootstrap&gt;", line 955, in _find_and_load_unlocked
  File "&lt;frozen importlib._bootstrap&gt;", line 665, in _load_unlocked
  File "&lt;frozen importlib._bootstrap_external&gt;", line 723, in exec_module
  File "&lt;frozen importlib._bootstrap&gt;", line 219, in _call_with_frames_remove
  File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\contrib\admin\__init__.py", 
  line 4, in &lt;module&gt;
  from django.contrib.admin.filters import (
  File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\contrib\admin\filters.py", 
  line 10, in &lt;module&gt;
  from django.contrib.admin.options import IncorrectLookupParameters
  File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\contrib\admin\options.py", 
  line 12, in &lt;module&gt;
  from django.contrib.admin import helpers, widgets
  File "C:\Users\Julcsi\djangogirls\myvenv\lib\site-packages\django\contrib\admin\widgets.py", 
  line 152
  '%s=%s' % (k, v) for k, v in params.items(),
  SyntaxError: Generator expression must be parenthesized
  </code></pre>
  
  <p>What am I doing wrong? What should I do?</p>
  
  <p>I have Python 3.7.0b1</p>
  
  <p>Thanks a lot in advance for the help :)</p>