As you said, that get request can obtain the object or the metadata of an object inside of your bucket. Using the call that you shared it will get only the metadata, if you want to obtain the object, you have to specify a destination with the "-o" flag, the command should be like the following:
curl -X GET \
-H "Authorization: Bearer [OAUTH2_TOKEN]" \
-o "[SAVE_TO_LOCATION]" \
"https://www.googleapis.com/storage/v1/b/[BUCKET_NAME]/o/[OBJECT_NAME]?alt=media"
Bear in mind that if you want to generate a token you can generate it with the following command:
gcloud beta auth application-default print-access-token
I am able to do it this way . However I was hoping that i could do this in python . But i think to do what i want in python the client api will have to be used. Thanks for the info.