I did the second test on the read, error:
C:\Anaconda3\python.exe C:/Users/liumin/PycharmProjects/StockA/GmailWrapperRead.py
C:\Anaconda3\lib\site-packages\oauth2client_helpers.py:255: UserWarning: Cannot access C:\Users\name.credentials\gmail-api-wrapper-py.json: No such file or directory
warnings.warn(_MISSING_FILE_MESSAGE.format(filename))
It did open a browser, but still gave me an final error after the above error:
==noauth_local_webserver (it popped up an login page, I login, webpage showed authorization success)