app 이 없다고 합니다.

Microsoft Windows [Version 10.0.18363.720]

(c) 2019 Microsoft Corporation. All rights reserved.

C:\Python\myweb>c:/Python/myweb/venv/Scripts/activate.bat

(venv) C:\Python\myweb>c:/Python/myweb/venv/Scripts/python.exe c:/Python/myweb/run.py

Traceback (most recent call last):

  File "c:/Python/myweb/run.py", line 3, in <module>

    app - Flask(__name__)

NameError: name 'app' is not defined

app 이름이 존재하지 않는다고 합니다.