Execution errors. python 2.7 & Python 3.7

[matut0]

(jsonenv) host:Python-Demo-App.2x gpabon$ python main.py Traceback (most recent call last): File "main.py", line 1, in from hello import db, app File "/Users/gpabon/Documents/workspace/oracle-ddev-db/Python-Demo-App.2x/hello/init.py", line 1, in from hello import views File "/Users/gpabon/Documents/workspace/oracle-ddev-db/Python-Demo-App.2x/hello/views.py", line 3, in from hello import app, db, login_manager, db_connection ImportError: cannot import name app