ABCs are in collections.abc

diff --git a/src/pgwui_core/core.py b/src/pgwui_core/core.py
index 8b1c27e1847a57277c436fbd87b1adaade913d29..1ab09fe32e2d2dc38bc54efa4f7c4a80585f7e5b 100644 (file)
--- a/src/pgwui_core/core.py
+++ b/src/pgwui_core/core.py
@@ -40,7 +40,7 @@ from __future__ import division
 
 from csv import reader as csv_reader
 from cgi import escape as cgi_escape
-import collections
+import collections.abc
 import ast
 import markupsafe
 import hashlib
@@ -171,7 +171,7 @@ class UploadTableWTForm(UploadNullFileWTForm):
     ivals = UploadTableInitialPost
 
 
-class LoadedForm(collections.MutableMapping):
+class LoadedForm(collections.abc.MutableMapping):
     '''
     Abstract class representing an upload form.