I am testing my app using the terminal, which is quite handy in a pre-development phase.
so far, I have used spotipy.Spotify(client_credentials_manager=client_credentials_manager) within my python scripts in order to access data. 
SpotifyClientCredentials() requires client_idand client_secret as parameters.
now I need to access analysis_url data, which requires an access token.
Is there a way to include this access token requirement via my python script ran at command line or do I have to build an app on the browser just to do a simple test?
many thanks on advance.
Copy and paste the entire redirect URI from your browser to the terminal (when prompted) after successful authentication.  Your access token will be cached in the directory (look for .cache.<username>)
Spotify - access token from command line