python - Flask cli 无法导入使用 FLASK_APP 设置的应用程序

Question

按照 Flask 0.11 文档，我克隆了 Flask 存储库，创建了一个 virtualenv，并通过 pip install flask 安装了 Flask。我进入examples/flaskr目录，设置FLASK_APP环境变量，然后执行:

flask run

但是，我得到了以下错误:

Traceback (most recent call last):
  File "c:\python34\Lib\runpy.py", line 170, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\python34\Lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "D:\GitHub\flask\venv\Scripts\flask.exe\__main__.py", line 9, in <module>
  File "d:\github\flask\venv\lib\site-packages\flask\cli.py", line 478, in main
    cli.main(args=args, prog_name=name)
  File "d:\github\flask\venv\lib\site-packages\flask\cli.py", line 345, in main
    return AppGroup.main(self, *args, **kwargs)
  File "d:\github\flask\venv\lib\site-packages\click\core.py", line 696, in main
    rv = self.invoke(ctx)
  File "d:\github\flask\venv\lib\site-packages\click\core.py", line 1055, in invoke
    cmd_name, cmd, args = self.resolve_command(ctx, args)
  File "d:\github\flask\venv\lib\site-packages\click\core.py", line 1094, in resolve_command
    cmd = self.get_command(ctx, cmd_name)
  File "d:\github\flask\venv\lib\site-packages\flask\cli.py", line 316, in get_command
    rv = info.load_app().cli.get_command(ctx, name)
  File "d:\github\flask\venv\lib\site-packages\flask\cli.py", line 209, in load_app
    rv = locate_app(self.app_import_path)
  File "d:\github\flask\venv\lib\site-packages\flask\cli.py", line 89, in locate_app
    __import__(module)
ImportError: No module named 'flaskr'

如何正确运行 flaskr 示例？

Answer 1

我正在设置 FLASK_APP=flaskr。由于我没有在我的 virtualenv 中安装我的应用程序作为一个包，我需要添加 .py 扩展。

export FLASK_APP=flaskr.py