Checklist

• [ x ] I have verified that that issue exists against the master branch of Django REST framework.
• [ x ] I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• [ x ] This is not a usage question. (Those should be directed to the discussion group instead.)
• [ x ] This cannot be dealt with as a third party library. (We prefer new functionality to be in the form of third party libraries where possible.)
• [ x ] I have reduced the issue to the simplest possible case.
• I have included a failing test as a pull request. (If you are unable to do so we can still accept the issue.)

Steps to reproduce

Call get_schema_view with patterns=something and you get an error because it is not defined.

get_schema_view(title=None, url=None, renderer_classes=None):
     generator = SchemaGenerator(title=title, url=url)

link

but SchemaGenerator object allows:

class SchemaGenerator(object):
    def __init__(self, title=None, url=None, patterns=None, urlconf=None)

Expected behavior

Be able to call get_schema_view with patterns.
I don't know why it is not allowed given that the SchemaGenerator object that is instantiated allows patterns to limit the inspected urls.

Actual behavior

TypeError unexpected keyword argument