チラ裏です

No crypto library availableと出た場合

google-api-python-clientを使ったAPI認証時に

Traceback (most recent call last):
  File "xxxxx.py", line 30, in <module>
    main()
  File "xxxxx.py", line 18, in main
    scope)
  File "python3.5/site-packages/oauth2client/util.py", line 140, in positional_wrapper
    return wrapped(*args, **kwargs)
  File "python3.5/site-packages/oauth2client/client.py", line 1630, in __init__
    _RequireCryptoOrDie()
  File "python3.5/site-packages/oauth2client/client.py", line 1581, in _RequireCryptoOrDie
    raise CryptoUnavailableError('No crypto library available')
oauth2client.client.CryptoUnavailableError: No crypto library available