sort imports using isort. tested.

core/models/troggle.py

@@ -1,27 +1,25 @@
-import string
-import os
 import datetime
+import os
 import re
 import resource
-from subprocess import call
-
-from urllib.parse import urljoin
+import string
 from decimal import Decimal, getcontext
+from subprocess import call
+from urllib.parse import urljoin
+
 getcontext().prec=2 #use 2 significant figures for decimal calculations
 
-import settings
-
-from django.db import models
+from django.conf import settings
 from django.contrib import admin
 from django.contrib.auth.models import User
 from django.contrib.contenttypes.models import ContentType
-from django.conf import settings
-
-from django.urls import reverse
-from django.template import Context, loader
 from django.core.files.storage import FileSystemStorage
+from django.db import models
+from django.template import Context, loader
+from django.urls import reverse
 
-import troggle.core.models.survex 
+import settings
+import troggle.core.models.survex
 from troggle.core.utils import get_process_memory
 
 """This file declares TroggleModel which inherits from django.db.models.Model