Error: Could not locate a Flask application

neotao · 2019 年8 月 16 日 09:00

58%402x
结构如下，运行方式在helloflask下pipenv shell 进入虚拟环境后执行flask run 后报错

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.

求教各位！知道的请不吝赐教！谢谢

neotao · 2019 年8 月 16 日 11:08

试了一下把.flaskenv .env 以及app.py 全部放到helloflask文件夹下，一切正常。但是放回hello下，就继续报错

yannanxiu · 2019 年8 月 30 日 13:59

执行pipenv shell的时候，.env和.flaskenv要在当前目录下。

你放进helloflask/demos/hello就找不到了。

yannanxiu · 2019 年8 月 30 日 14:03

参考这里的源码：

github.com

pallets/flask/blob/1.0.2/flask/cli.py#L587


This is a no-op if `python-dotenv`_ is not installed.


.. _python-dotenv: https://github.com/theskumar/python-dotenv#readme


:param path: Load the file at this location instead of searching.
:return: ``True`` if a file was loaded.


.. versionadded:: 1.0
"""
if dotenv is None:
    if path or os.path.exists('.env') or os.path.exists('.flaskenv'):
        click.secho(
            ' * Tip: There are .env files present.'
            ' Do "pip install python-dotenv" to use them.',
            fg='yellow')
    return


if path is not None:
    return dotenv.load_dotenv(path)


new_dir = None

neotao · 2019 年9 月 1 日 05:34

十分感谢！