I'm receiving this error when trying to install Google Assistant, and I am using Windows 10, Python 3.6 and SDK 0.3.3. Could someone please recommend the next step? I've tried inputting in the string recommended on other sites, which ends with --scope https://googleapis.com... but this did not work.
Easy fix but hard to find. You just need to make sure that all the settings are there as mentioned before. I completed the above actions, and then I set it to administrator and input the 3 commands:
pip install --upgrade google-api-python-client
pip install --upgrade google-auth-oauthlib[tool]
google-oauthlib-tool --client-secrets path/to/client_secret_XXXXX.json --scope https://www.googleapis.com/auth/assistant-sdk-prototype --save --headless
Success!
After running command: google-oauthlib-tool --client-secrets c:\client_secret_XXXXX.json --scope https://www.googleapis.com/auth/assistant-sdk-prototype --save --headless
On very next line, it says: Please visit this URL to authorize this application
Open this link and authorize on google and it will provide authorization code, enter this code against "Enter the authorization code:" and you are done.
来源：https://stackoverflow.com/questions/45779671/no-module-named-googlesamples-assistant-auth-helpers