ConorMcGee

def my_view_mocker(view):
    view.request.tacos = 'Hi'
    print "This is the viewmocker, just changed view.request.tacos to %s" % view.request.tacos
    return view

class FileTree(generics.ListAPIView):
    model = File
    lookup_field = 'file_id'
    paginate_by = 25
    paginate_by_param = 'items'

ConorMcGee

from some_library import OriginalClass

class CustomClass(OriginalClass):
  def original_method(*args, **kwargs):
      # do stuff the way I want to do it instead of the way the library does it