Try to import from collections.abc, which will be required in Python 3.8+

Author: Peter Yin

jose/jws.py

@@ -3,7 +3,10 @@
 import json
 import six
 
-from collections import Mapping, Iterable
+try:
+    from collections.abc import Mapping, Iterable  # Python 3
+except ImportError:
+    from collections import Mapping, Iterable  # Python 2, will be deprecated in Python 3.8
 
 from jose import jwk
 from jose.constants import ALGORITHMS

jose/jwt.py

@@ -2,7 +2,10 @@
 import json
 
 from calendar import timegm
-from collections import Mapping
+try:
+    from collections.abc import Mapping  # Python3
+except ImportError:
+    from collections import Mapping  # Python2, will be depecrated in Python 3.8
 from datetime import datetime
 from datetime import timedelta
 from six import string_types