Windows下Flask run報錯'Could not locate flask application' 緣由?

• 運行環境Windows系統, 命令行工具powershell
• 執行以下命令報錯:
  1. 設置set FLASK_APP = run.py
  2. 運行flask run

• 報錯以下: Flask找不到上面設置的應用,或者說找不到運行腳本run.py而報出: Error: Could not locate flask application. You did not provide the FLASK_APP environment variable

• 具體緣由不清楚,不過找到了解決方案,將下面命令替換set FLASK_APP = run.py 成 $env:FLASK_APP = "run.py"

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參考自Stack Overflow: https://stackoverflow.com/questions/37826016/env-variables-not-set-while-running-minimal-flask-application

問題:

解決方案: