old_contents: # -*- coding: utf-8 -*-
  from __future__ import absolute_import
  from __future__ import unicode_literals
  from __future__ import print_function
  from __future__ import division
  # TODO: Review this file. Legacy??!
  from future import standard_library
  standard_library.install_aliases()
  from builtins import *
  from builtins import object
  from django.forms import FileField, ModelForm
  from django.utils.translation import ugettext_lazy as _
  from geonode.base.forms import ResourceBaseForm
  from .models import App, AppInstance
  from modeltranslation.forms import TranslationModelForm
  
  
  class AppInstallerForm(ModelForm):
      error_messages = {
          'duplicate_app_name':
          _("An application with the same user has already installed."),
          'invalid_package_file':
          _("The uploaded file is not an application package."),
      }
      package_file = FileField()
  
      class Meta(object):
          model = App
          fields = ("package_file",)
  
  
  class AppForm(ModelForm):
  
      class Meta(object):
          model = App
          fields = ("title",)
  
  
  class AppInstanceForm(TranslationModelForm):
  
      class Meta(object):
          model = AppInstance
          fields = [
              'title',
              'abstract',
          ]
  
  
  class AppInstanceEditForm(ResourceBaseForm):
  
      class Meta(ResourceBaseForm.Meta):
          model = AppInstance
          exclude = ResourceBaseForm.Meta.exclude
  
new_contents: # -*- coding: utf-8 -*-
  from __future__ import (absolute_import, division, print_function,
                          unicode_literals)
  
  from builtins import *
  
  from django.forms import FileField, ModelForm
  from django.utils.translation import ugettext_lazy as _
  # TODO: Review this file. Legacy??!
  from future import standard_library
  from modeltranslation.forms import TranslationModelForm
  
  from geonode.base.forms import ResourceBaseForm
  
  from .models import App, AppInstance
  
  standard_library.install_aliases()
  
  
  class AppInstallerForm(ModelForm):
      error_messages = {
          'duplicate_app_name':
          _("An application with the same user has already installed."),
          'invalid_package_file':
          _("The uploaded file is not an application package."),
      }
      package_file = FileField()
  
      class Meta(object):
          model = App
          fields = ("package_file",)
  
  
  class AppForm(ModelForm):
  
      class Meta(object):
          model = App
          fields = ("title",)
  
  
  class AppInstanceForm(TranslationModelForm):
  
      class Meta(object):
          model = AppInstance
          fields = [
              'title',
              'abstract',
          ]
  
  
  class AppInstanceEditForm(ResourceBaseForm):
  
      class Meta(ResourceBaseForm.Meta):
          model = AppInstance
          exclude = ResourceBaseForm.Meta.exclude
  
subject: fix pep for forms.py