Add comments and linting

Signed-off-by: Emmy D'Anello <emmy.danello@animath.fr>

participation/views.py

@@ -718,6 +718,9 @@ class PoolUpdateTeamsView(VolunteerMixin, UpdateView):
 
 
 class PoolAddJurysView(VolunteerMixin, FormView, DetailView):
+    """
+    This view lets organizers set jurys for a pool, without multiplying clicks.
+    """
     model = Pool
     form_class = AddJuryForm
     template_name = 'participation/pool_add_jurys.html'
@@ -731,21 +734,26 @@ class PoolAddJurysView(VolunteerMixin, FormView, DetailView):
     def form_valid(self, form):
         self.object = self.get_object()
 
+        # Save the user object first
         form.save()
         user = form.instance
+        # Create associated registration object to the new user
         reg = VolunteerRegistration.objects.create(
             user=user,
             professional_activity="Juré⋅e du tournoi " + self.object.tournament.name,
         )
+        # Add the user in the jury
         self.object.juries.add(reg)
         self.object.save()
 
         reg.send_email_validation_link()
 
+        # Generate new password for the user
         password = get_random_string(16)
         user.set_password(password)
         user.save()
 
+        # Send welcome mail
         subject = "[TFJM²] " + str(_("New TFJM² jury account"))
         site = Site.objects.first()
         message = render_to_string('registration/mails/add_organizer.txt', dict(user=user,
@@ -758,12 +766,14 @@ class PoolAddJurysView(VolunteerMixin, FormView, DetailView):
                                                                               domain=site.domain))
         user.email_user(subject, message, html_message=html)
 
-        messages.success(self.request, _("The jury {name} has been successfully added!")\
+        # Add notification
+        messages.success(self.request, _("The jury {name} has been successfully added!")
                          .format(name=f"{user.first_name} {user.last_name}"))
 
         return super().form_valid(form)
 
     def form_invalid(self, form):
+        # This is useful since we have a FormView + a DetailView
         self.object = self.get_object()
         return super().form_invalid(form)