Import ABC from collections.abc for Python 3.9 compatibility.

moto/datapipeline/utils.py

@@ -1,5 +1,5 @@
-import collections
 import six
+from moto.compat import collections_abc
 from moto.core.utils import get_random_hex
 
 
@@ -8,13 +8,13 @@ def get_random_pipeline_id():
 
 
 def remove_capitalization_of_dict_keys(obj):
-    if isinstance(obj, collections.Mapping):
+    if isinstance(obj, collections_abc.Mapping):
         result = obj.__class__()
         for key, value in obj.items():
             normalized_key = key[:1].lower() + key[1:]
             result[normalized_key] = remove_capitalization_of_dict_keys(value)
         return result
-    elif isinstance(obj, collections.Iterable) and not isinstance(
+    elif isinstance(obj, collections_abc.Iterable) and not isinstance(
         obj, six.string_types
     ):
         result = obj.__class__()