Timbre transfer google colab error

[Ramakanth R Gunishetty]

Hello ,I am Ramakanth R Gunishetty ,I recently working based on magenta timbre transfer project 

AttributeError Traceback (most recent call last)
in <cell line: 98>()
96
97 # Set up the model just to predict audio given new conditioning
---> 98 model = ddsp.training.models.Autoencoder()
99 model.restore(ckpt)
100
12 frames
/usr/local/lib/python3.8/dist-packages/ddsp/core.py in make_iterable(x)
45 return [x]
46 else:
---> 47 return x if isinstance(x, collections.Iterable) else [x]
48
49
AttributeError: module 'collections' has no attribute 'Iterable'
In call to configurable 'F0LoudnessPreprocessor' (<class 'ddsp.training.preprocessing.F0LoudnessPreprocessor'>)

I got above errors when I m running timbre transfer in google colab ,Kindly check and resolve errors