Optimize filtering of search results Now the Permission class constructor takes an optional argument 'filter'. Now if we do not find a permission on the whole class *and* all permission objects on the current class with a check method also have a filter method we can improve search performance by filtering in the database (instead of in python).

try:
    # Python 2.
    my_input = raw_input
except NameError:
    # Python 3+.
    my_input = input