sort imports using isort. tested.

core/views/caves.py

@@ -1,25 +1,29 @@
 import os
-import string
 import re
-import settings
-import urllib.parse
+import string
 import subprocess
+import urllib.parse
 from pathlib import Path
 
 from django import forms
 from django.conf import settings
-from django.urls import reverse
-from django.http import HttpResponse, HttpResponseRedirect, HttpResponseNotFound
+from django.core.exceptions import MultipleObjectsReturned, ObjectDoesNotExist
+from django.http import (HttpResponse, HttpResponseNotFound,
+                         HttpResponseRedirect)
 from django.shortcuts import get_object_or_404, render
-from django.core.exceptions import ObjectDoesNotExist, MultipleObjectsReturned
-from django.urls import NoReverseMatch
+from django.urls import NoReverseMatch, reverse
 
+import settings
 import troggle.settings as settings
+from troggle.core.forms import (CaveAndEntranceFormSet, CaveForm, EntranceForm,
+                                EntranceLetterForm)
+from troggle.core.models.caves import (QM, Area, Cave, CaveAndEntrance,
+                                       CaveSlug, Entrance, EntranceSlug,
+                                       GetCaveLookup, SurvexStation)
+from troggle.core.models.troggle import DataIssue, Expedition
+from troggle.core.utils import write_and_commit, writetrogglefile
 from troggle.core.views import expo
-from troggle.core.models.troggle import Expedition, DataIssue
-from troggle.core.models.caves import CaveSlug, Cave, CaveAndEntrance, QM, EntranceSlug, Entrance, Area, SurvexStation, GetCaveLookup
-from troggle.core.forms import CaveForm, CaveAndEntranceFormSet, EntranceForm, EntranceLetterForm
-from troggle.core.utils import writetrogglefile, write_and_commit
+
 from .auth import login_required_if_public
 
 '''Manages the complex procedures to assemble a cave description out of the compnoents