From c95a5d2f0cabaf98d795d6786ee617ef045282f6 Mon Sep 17 00:00:00 2001
From: Steven Loria <sloria1@gmail.com>
Date: Tue, 12 Feb 2019 11:17:11 -0600
Subject: [PATCH] Address warning about importing from collections on Python 3

---
 flex/constants.py | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/flex/constants.py b/flex/constants.py
index a2b55b1..f7f6c88 100644
--- a/flex/constants.py
+++ b/flex/constants.py
@@ -1,7 +1,10 @@
 from __future__ import unicode_literals
 
 import numbers
-import collections
+try:
+    from collections.abc import Sequence, Mapping
+except ImportError:  # Python 2
+    from collections import Sequence, Mapping
 import six
 
 
@@ -32,8 +35,8 @@
     INTEGER: six.integer_types,
     NUMBER: (numbers.Number,),
     STRING: (six.binary_type, six.text_type),
-    ARRAY: (collections.Sequence,),
-    OBJECT: (collections.Mapping,),
+    ARRAY: (Sequence,),
+    OBJECT: (Mapping,),
 }
 
 TRUE_VALUES = set(('true', 'True', '1'))