Windows Powershell上的烧瓶 [英] Flask on Windows powershell

问题描述

我已经安装了Flask，并且我正在尝试使用Windows Power Shell运行Flask但我无法这样做

i have installed flask and i am trying to run flask using the windows power shell but i am unable to do so

PS C:\path\to\app> $env:FLASK_APP = "hello.py"

格式已提供文档，我们应该在 $ env 中键入什么?

the format is given the documentation what should we type in $env?

p.s.我能够使用代码在命令提示符下运行flask

p.s. I was able to run flask using command prompt using the code

推荐答案

• 首先，您必须为 Flask 应用程序激活虚拟环境(我假设您正在使用python的默认虚拟环境模块 venv :py -m venv venv )
• first, you have to activate the virtual environment for your Flask app (i'm assuming you are using venv the default virtual environment module for python : py -m venv venv)

PS C:\myapps\flask\helloflask> .\venv\Scripts\activate
(venv) PS C:\myapps\flask\helloflask>

• 设置 FLASK_APP 环境变量:

(venv) PS C:\myapps\flask\helloflask> $env:FLASK_APP="helloflask:create_app('development')"

请注意用双引号引起来的应用名称"helloflask:create_app('development')" ，否则 Power Shell 会触发红色错误.

note the double quotes wrapping the app name "helloflask:create_app('development')" otherwise Power Shell triggers a red error.

在使用 app时，请参考 doc 工厂模式，我会向您推荐读物关于如何运行Flask应用程序

• 也许您想检查是否已设置 FLASK_APP :

(venv) PS C:\myapps\flask\helloflask> $env:FLASK_APP
helloflask:create_app('development')

• 现在您可以运行您的 Flask 应用程序:

(venv) PS C:\myapps\flask\helloflask> flask run
 * Serving Flask app "helloflask:create_app('development')"
 * Environment: development
 * Debug mode: off
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
127.0.0.1 - - [23/Jun/2020 12:47:20] "←[37mGET / HTTP/1.1←[0m" 200 -

最后，我建议您在项目根目录下使用 .flaskenv 来存储与您的 Flask 应用程序相关的环境变量(其中包括 FLASK_APP ):

finally i recommend you using .flaskenv under the root of your project to store your Flask app related environment variables (FLASK_APP among others):

FLASK_APP=helloflask:create_app('development')
# FLASK_APP=helloflask:create_app('testing')
# FLASK_APP=helloflask:create_app('production')

FLASK_ENV=development
FLASK_DEBUG=0

# FLASK_RUN_EXTRA_FILES=
# FLASK_RUN_HOST=
# FLASK_RUN_PORT=8080
# FLASK_RUN_CERT=
# FLASK_RUN_KEY=

要利用此选项，您必须安装 python-dotenv 软件包(请查看此

To take advantage of this option you have to install the python-dotenv package (have a look at this doc). To do so :

(venv) PS C:\mypps\flask\helloflask> pip install python-dotenv

这篇关于Windows Powershell上的烧瓶的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！