Explicitly cast unicode to string for uuid return values

Author: Felix Finkbeiner

ci/integration_test.py

@@ -1,4 +1,3 @@
-from __future__ import print_function
 import os
 import time
 from queries import *

weaviate/batch.py

@@ -1,3 +1,4 @@
+from __future__ import unicode_literals
 import validators
 import copy
 

weaviate/client.py

@@ -95,7 +95,7 @@ def create_thing(self, thing, class_name, uuid=None, vector_weights=None):
                 sys.exc_info()[2])
 
         if response.status_code == 200:
-            return response.json()["id"]
+            return str(response.json()["id"])
 
         else:
             thing_does_already_exist = False