FlaskError: locate a Flask application,provide the FLASK_APP

问题&报错:

Error: Could not locate a Flask application. You did not provide the “FLASK_APP” environment variable, and a “wsgi.py” or “app.py” module was not found in the current directory.

解决方案：

在windows下，powershell需要使用以下语法：

$env:FLASK_APP = "flaskr"
$env:FLASK_ENV = "development"

flask run

引用:

https://github.com/Microsoft/vscode-docs/issues/1881