Import error in Google-Forms-Data-Analysis.ipynb

[maverickactuary]

For me this gives the unfortunate ImportError: cannot import name 'SignedJwtAssertionCredentials' as explained at https://stackoverflow.com/questions/14063124/importerror-cannot-import-name-signedjwtassertioncredentials

However the proposed solution on SO i.e.pip install oauth2client==1.5.2
just gives me a later error:
FileNotFoundError: [Errno 2] No such file or directory: 'Pbpython-key.json'
I'm not yet competent enough to take this forward.