jetson nano上でpytorchをimportしようとするもエラー（ImportError: No module named builtins）

jetson nano上でpytorchをimportしようとするもエラー

# python -c 'import torch; print(torch.__version__) '
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/torch/__init__.py", line 19, in <module>
    from ._six import string_classes as _string_classes
  File "/usr/local/lib/python2.7/dist-packages/torch/_six.py", line 23, in <module>
    import builtins
ImportError: No module named builtins

こちらやこちらを参考に、futureをインストールして解決。

# pip install future
Collecting future
  Downloading https://files.pythonhosted.org/packages/45/0b/38b06fd9b92dc2b68d58b75f900e97884c45bedd2ff83203d933cf5851c9/future-0.18.2.tar.gz (829kB)
    100% |################################| 829kB 416kB/s 
Building wheels for collected packages: future
  Running setup.py bdist_wheel for future ... done
  Stored in directory: /root/.cache/pip/wheels/8b/99/a0/81daf51dcd359a9377b110a8a886b3895921802d2fc1b2397e
Successfully built future
Installing collected packages: future
Successfully installed future-0.18.2

# python -c 'import torch; print(torch.__version__) '
1.4.0a0+7f73f1d

参考

https://stackoverflow.com/questions/27495752/no-module-named-builtins
ytorch-for-jetson-version-1-7-0-now-available