sort imports using isort. tested.

core/views/drawings.py

@@ -1,14 +1,17 @@
-import os, stat
+import os
 import re
+import stat
 from pathlib import Path
-from urllib.parse import urljoin, unquote as urlunquote
+from urllib.parse import unquote as urlunquote
+from urllib.parse import urljoin
 
 from django.conf import settings
-from django.shortcuts import render
 from django.http import HttpResponse
+from django.shortcuts import render
 
 from troggle.core.models.survex import DrawingFile
 from troggle.core.views.expo import getmimetype
+
 #import parsers.surveys
 
 '''Some of these views serve files as binary blobs, and simply set the mime type based on the file extension,