将JustPy部署到Heroku

Question

我正试图在Heroku上部署一个JustPy应用程序。我对两者都是新手。

基码，来自https://justpy.io/tutorial/getting_started/

# saved as app.py
import justpy as jp
app = jp.app # added for deployment

def hello_world():
    wp = jp.WebPage()
    jp.Hello(a=wp)
    return wp

jp.justpy(hello_world)

若要部署到Heroku帐户，请从以下https://devcenter.heroku.com/articles/heroku-cli获取Heroku工具

从您的项目文件夹：

pip install gunicorn
pip freeze > requirements.txt
# create Procfile web:- gunicorn app:app
# create runtime.txt:- Python 3.9.5 
heroku login
heroku create justpyhi
git init
git add .   
git config --global user.email "myemail@hotmail.com"
git config --global user.name "whateverusername"
git commit -m "first commit"
heroku git:remote --app justpyhi
git push heroku master
heroku open

...and我得到以下错误：

Starting process with command `gunicorn mainheroku l`
app[web.1]: bash: gunicorn: command not found
heroku[web.1]: Process exited with status 127
heroku[web.1]: State changed from starting to crashed
heroku[web.1]: State changed from crashed to starting
app[api]: Build succeeded

更新:我得到了进一步的错误：

-----> Building on the Heroku-20 stack
-----> Using buildpack: heroku/python
-----> App not compatible with buildpack: https://buildpack-registry.s3.amazonaws.com/buildpacks/heroku/python.tgz
       More info: https://devcenter.heroku.com/articles/buildpacks#detection-failure
 !     Push failed

我做错了什么？感谢所有的帮助！

Answer 1

请参阅https://devcenter.heroku.com/articles/getting-started-with-python?singlepage=true#define-a-procfile

你只需要三个文件：

1. requirements.txt
2. Procfile
3. hello_world.py

requirements.txt

# https://github.com/justpy-org/justpy
# install justpy
justpy

Procfile

web: python hello_world.py

hello_world.py

# saved as app.py
import justpy as jp
import os
app = jp.app # added for deployment

def hello_world():
    wp = jp.WebPage()
    jp.Hello(a=wp)
    return wp

port=os.environ['PORT']
jp.justpy(hello_world,port=port,host='0.0.0.0')

主要问题是通过" port“环境变量从heroku获取分配的端口，并将主机设置为'0.0.0.0‘以侦听所有接口。

看见

1. https://stackoverflow.com/a/15693371/1497139