Windows下Flask run报错'Could not locate flask application' 原因?

• 运行环境Windows系统, 命令行工具powershell

• 执行如下命令报错:

  1. 设置set FLASK_APP = run.py
  2. 运行flask run

• 报错如下: Flask找不到上面设置的应用,或者说找不到运行脚本run.py而报出: Error: Could not locate flask application. You did not provide the FLASK_APP environment variable

• 具体原因不清楚,不过找到了解决方案,将下面命令替换set FLASK_APP = run.py 成 $env:FLASK_APP = "run.py"

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

问题:

解决方案: