Sort imports with isort

fioul.py

@@ -1,13 +1,14 @@
 #! /usr/bin/env python3
 
+import json
 from argparse import ArgumentParser
-from config import conf
 from datetime import date
-from models import Price, IntegrityError
 
 import requests
-import json
+
 import webapp
+from config import conf
+from models import IntegrityError, Price
 
 
 def get_today_price_from_internet():