Make this code compatible with Python 3.10.

yilei · Magenta Team · commit 9866d3aaa6d1 · 2022-09-13T17:16:54.000-07:00
PiperOrigin-RevId: 474162831
diff --git a/ddsp/core.py b/ddsp/core.py
@@ -14,7 +14,7 @@
 
 """Library of functions for differentiable digital signal processing (DDSP)."""
 
-import collections
+from collections import abc
 import copy
 from typing import Any, Dict, Optional, Sequence, Text, TypeVar
 
@@ -44,7 +44,7 @@ def make_iterable(x):
     # Wrap in list so you don't iterate over the batch.
     return [x]
   else:
-    return x if isinstance(x, collections.Iterable) else [x]
+    return x if isinstance(x, abc.Iterable) else [x]
 
 
 def to_dict(x, keys):
