Using justpy with heroku¶

Installation¶

npm install -g heroku

Getting started with python in general¶

If you'd like to try out how python apps work in general in heroku you might want to check https://devcenter.heroku.com/articles/getting-started-with-python

Credentials¶

see $HOME/.netrc after

heroku login

Create personal heroku justpy demo app¶

create an app in heroku and check it out with git¶

https://dashboard.heroku.com/apps New/Create new app choose an available name by adding your initials or any other available suffix to justpy-demo in my case Wolfgang Fahl=wf

justpy-demo-wf follow the instructions to get your git repository

add files¶

see https://github.com/justpy-org/justpy/tree/master/tutorial/heroku

Procfile¶

web: python examples/demo_browser.py --heroku -d

requirements.txt¶

# WF 2022-10-19
# heroku  justpy demo browser dependencies
#
# install justpy
# check for latest version at https://pypi.org/project/justpy/
justpy>=0.10.5
# install dependencies for examples
altair
bokeh
matplotlib
pandas
pandas_datareader
plotly
pydeck
pygments
scipy
seaborn
vega_datasets
# debugging
pydevd

getjustpy¶

#!/bin/bash
# WF 2022-10-19
# get the justpy examples and tutorial files
# remember the current directory
pwd=$(pwd)
# url of justpy repository
giturl=https://github.com/justpy-org/justpy
# get a temporary directory
gitdir=$(mktemp -u)
mkdir -p $gitdir
# switch to the temporary directory
cd $gitdir
if [ ! -d justpy ]
then
  echo "cloning to $gitdir"
  git clone --depth=1 $giturl
fi
rm -rf justpy/.git
rsync -avz justpy/examples $pwd --delete

get the justpy examples¶

# make script executable
chmod +x getjustpy
# git clone justpy and rsync examples directory to local directory
./getjustpy
# add justpy examples copy
git add examples

change PYTHONPATH via config (see also below)¶

heroku config:set PYTHONPATH=.

commit and push¶

git commit -am "initial check in"
# try with "main" if it won't work with "master"
git push heroku master

try out¶

replace "wf" with you own suffix http://justpy-demo-wf.herokuapp.com/

Further commands¶

Status Log¶

heroku logs --tail

restart¶

heroku restart

Configs¶

heroku config:set PYTHONPATH=.

Cancelling builds¶

E.g. in case you see Your account has reached its concurrent builds limit. see https://stackoverflow.com/a/60215424/1497139 ` heroku plugins:install heroku-builds heroku builds:cancel

Demo¶

http://justpy-demo.herokuapp.com/