backups: Minor styling fixes

- More descriptive iteration variables
- Run yafp, isort

Signed-off-by: Joseph Nuthalapati <njoseph@thoughtworks.com>

plinth/modules/backups/__init__.py

@@ -84,10 +84,10 @@ def _backup_handler(packet):
     manifest_path = MANIFESTS_FOLDER + get_valid_filename(
         packet.label) + '.json'
     manifests = [{
-        'name': x[0],
-        'version': x[1].version,
-        'backup': x[2]
-    } for x in packet.manifests]
+        'name': manifest[0],
+        'version': manifest[1].version,
+        'backup': manifest[2]
+    } for manifest in packet.manifests]
     with open(manifest_path, 'w') as manifest_file:
         json.dump(manifests, manifest_file)
 
@@ -134,7 +134,7 @@ def get_export_files():
     export_files = {}
     for location in locations:
         output = actions.superuser_run(
-            'backups', ['list-exports', '--location',  location[0]])
+            'backups', ['list-exports', '--location', location[0]])
         export_files[location[1]] = json.loads(output)
 
     return export_files
@@ -157,21 +157,17 @@ def find_exported_archive(disk_label, archive_name):
 
 def get_export_apps(filename):
     """Get list of apps included in exported archive file."""
-    output = actions.superuser_run(
-        'backups', ['get-export-apps', '--filename', filename])
+    output = actions.superuser_run('backups',
+                                   ['get-export-apps', '--filename', filename])
     return output.splitlines()
 
 
 def _restore_handler(packet):
     """Perform restore operation on packet."""
-    locations = {
-        'directories': packet.directories,
-        'files': packet.files
-    }
+    locations = {'directories': packet.directories, 'files': packet.files}
     locations_data = json.dumps(locations)
-    actions.superuser_run(
-        'backups', ['restore', '--filename', packet.label],
-        input=locations_data.encode())
+    actions.superuser_run('backups', ['restore', '--filename', packet.label],
+                          input=locations_data.encode())
 
 
 def restore_exported(label, name, apps=None):

plinth/modules/backups/backups.py

@@ -91,9 +91,9 @@ class Packet:
         """Look at manifests and fill up the list of directories/files."""
         for manifest in self.manifests:
             backup = manifest[2]
-            for x in ['config', 'data', 'secrets']:
-                self.directories += backup[x]['directories']
-                self.files += backup[x]['files']
+            for section in ['config', 'data', 'secrets']:
+                self.directories += backup[section]['directories']
+                self.files += backup[section]['files']
 
 
 def backup_full(backup_handler, label=None):

plinth/modules/backups/tests/test_backups.py

@@ -58,11 +58,11 @@ class TestBackups(unittest.TestCase):
         packet = Packet('backup', 'apps', '/', manifests)
         for manifest in manifests:
             backup = manifest[2]
-            for x in ['config', 'data', 'secrets']:
-                for d in backup[x]['directories']:
-                    assert d in packet.directories
-                for f in backup[x]['files']:
-                    assert f in packet.files
+            for section in ['config', 'data', 'secrets']:
+                for directory in backup[section]['directories']:
+                    assert directory in packet.directories
+                for file_path in backup[section]['files']:
+                    assert file_path in packet.files
 
     def test_backup_apps(self):
         """Test that backup_handler is called."""
@@ -88,7 +88,7 @@ class TestBackups(unittest.TestCase):
         load_modules()
         app_names = ['config', 'names']
         apps = _get_apps_in_order(app_names)
-        ordered_app_names = [x[0] for x in apps]
+        ordered_app_names = [app[0] for app in apps]
 
         names_index = ordered_app_names.index('names')
         config_index = ordered_app_names.index('config')

plinth/modules/backups/views.py

@@ -19,6 +19,7 @@ Views for the backups app.
 """
 
 from datetime import datetime
+from urllib.parse import unquote
 
 from django.contrib import messages
 from django.contrib.messages.views import SuccessMessageMixin
@@ -27,7 +28,6 @@ from django.shortcuts import redirect
 from django.urls import reverse_lazy
 from django.utils.translation import ugettext as _
 from django.views.generic import FormView, TemplateView
-from urllib.parse import unquote
 
 from plinth.modules import backups
 
@@ -49,7 +49,7 @@ class IndexView(TemplateView):
         context['archives'] = backups.list_archives()
         context['exports'] = backups.get_export_files()
         apps = backups_api.get_all_apps_for_backup()
-        context['available_apps'] = [x[0] for x in apps]
+        context['available_apps'] = [app[0] for app in apps]
         return context
 
 
@@ -122,8 +122,7 @@ class ExportArchiveView(SuccessMessageMixin, FormView):
 
     def form_valid(self, form):
         """Create the archive on valid form submission."""
-        backups.export_archive(self.kwargs['name'],
-                               form.cleaned_data['disk'])
+        backups.export_archive(self.kwargs['name'], form.cleaned_data['disk'])
         return super().form_valid(form)
 
 
@@ -157,7 +156,8 @@ class RestoreView(SuccessMessageMixin, FormView):
         """Pass additional keyword args for instantiating the form."""
         kwargs = super().get_form_kwargs()
         kwargs['apps'] = [
-            x for x in self.installed_apps if x[0] in self.included_apps]
+            app for app in self.installed_apps if app[0] in self.included_apps
+        ]
         return kwargs
 
     def get_context_data(self, **kwargs):
@@ -170,7 +170,7 @@ class RestoreView(SuccessMessageMixin, FormView):
 
     def form_valid(self, form):
         """Restore files from the archive on valid form submission."""
-        backups.restore_exported(unquote(self.kwargs['label']),
-                                 self.kwargs['name'],
-                                 form.cleaned_data['selected_apps'])
+        backups.restore_exported(
+            unquote(self.kwargs['label']), self.kwargs['name'],
+            form.cleaned_data['selected_apps'])
         return super().form_valid(form)