libffi VS kivy

Ok, there is a missing dependency, libffi6, which cannot be installed, because it isn't at repos. You can either install it via downloading from other repos (there is a chance in the debian repo), or via compiling on your own (you can start with paying a visit to official site: https://sourceware.org/libffi/). Either way, move carefully and never forget when a dependency is missing, it may be a start of a "missing dependencies hell". And please, be caution, because you can break your system quite easily.

I've been working in implementing libffi into Euphoria so we can call Raylib functions directly. Previously, Euphoria did not support passing structures by value and only occasionally could we get away with "faking" it by passing int type values directly (but not float types). Raylib is the first library I've run into that makes heavy use of passing structures by value, so it's been an interesting challenge. My original proof of concept worked well with libffi built as a shared library, so now I'm working on building libffi directly into the backend of Euphoria. Then we'll be off and running with full support for Raylib!

I did some more looking around, and I think you should take a look into libffi. It has most of the dirty work done for you, and you can hook it up with your language.

The last line of output is from configure and appears to be during building of libffi recipe - apparently executing the generate-darwin-source-and-headers.py from libffi repository

ok... I did my python 3.9 upgrade on my Rpi3b+ ... here's what I learned: 1) If you're running Debian Buster, you really probably want to upgrade to Bullseye first https://www.tomshardware.com/how-to/upgrade-raspberry-pi-os-to-bullseye-from-buster If you stay on buster, then homeassistant won't start until you build libffi-3.3 as below: 2021-12-29 16:51:14 ERROR (MainThread) [homeassistant.auth.providers] Unable to load auth provider homeassistant: libffi.so.7: cannot open shared object file: No such file or directory https://community.home-assistant.io/t/python-install-on-raspberry-pi-os/241558/12 wget "https://github.com/libffi/libffi/releases/download/v3.3/libffi-3.3.tar.gz" tar zxf libffi-3.3.tar.gz cd libffi-3.3 ./configure sudo make install sudo ldconfig Other than that, it was pretty straightforward. Do be aware that after you redeploy home assistant, a LOT of stuff is happening in the background and it will take a while before everything comes up. Don't freak out. Don't reboot or power cycle. Instead, do this: tail -f /var/log/homeassistant/home-assistant.log and watch the updates

build-essential installs everything required for compiling basic software written in C and C++ in this case Python. Read more... zlib1g-devis the development package of the compression library that implements the deflate compression methods and essential in Python's installation and other installations as well. Read more... libncurses5-dev is the development package for the curses library that provides a terminal-independent screen-painting and keyboard-handling tool. Read more... libgdbm-dev is a development library for GDBM whose functionality is to store key/data pairs in a data file. Read more... libnss3-dev Read more... libssl-dev Read more... libreadline-dev Read more... libffi-dev Read more... libsqlite3-dev Read more... wget Read more... libbz2-dev Read more... In the next step we can either manually download the latest release of Python from the Python Official Release page or use wget which we have installed in previous command. To download using wget, paste the following command in the terminal to download Python in the computer.

[INFO]: -> running basename https://github.com/libffi/libffi/archive/v3.3.tar.gz

libffi C library

If you have read my earlier posts you know I love multilingual programming. One important part of multilingual programming is how to interface one language with other. Typically this is called FFI or foreign function interface. At the lowest level often there are libraries (aka bindings) to talk across languages or across implementations of same language e.g. libffi. In my undergrad we did a group project where we created language bindings to separate algorithmic part written in python and opencv and X11 logic in c.

We will create this complete Python registration form using Kivy. We get started by installing Kivy, a powerful Python framework for building interactive applications.

For reference, YouTube runs on Python[1,2,3]:

> 1. Python and Django: YouTube’s backend is predominantly written in Python, offering a balance of performance and readability.

> 2. Google Cloud Platform...

> 3. Java and C++: YouTube also utilizes Java and C++ for specific backend services, as they provide better performance for certain tasks.

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A long time ago, I looked into these Python frameworks:

- http://www.web2py.com/

- https://kivy.org/

[1]: https://blogopost.com/youtube-tech-stack/#backend

[2]: https://medium.com/@shanthanaroja99/technology-stack-behind-...

[3]: https://youtu.be/G-lGCC4KKok

I have a multi-threaded app using Kivy for the GUI and sometimes need to update the GUI from a background thread. This app is a few years old and I recently updated to Kivy 2.2 and am now getting an exception with the message "Cannot create graphics instruction outside the main Kivy thread" -- which is related to this change in Kivy 2.1: https://github.com/kivy/kivy/pull/7270

I suggest you use kivy which is suitable for the desktop but also has the advantage of being one of few options for creating Python based native(ish) mobile apps (for IoS and Android app stores).

I think the best one right now for python is "beeware": https://beeware.org/

You also have Kivy which is prety good: https://kivy.org/

Anyone has some experience with Kivy [1]? It seems that it checks off some of my requirements, like cross-platform, supporting touch interfaces, ease of development, allows complex/fancy UIs as well, etc.

[1] https://kivy.org/

There are hot reload tools like kivy.tools.kviewer and KivyMD HotReload and I think others... but maybe they used something else, hard to tell

Notable Projects: Kivy ( https://kivy.org/ )

My name is Mathieu Virbel, and I am a consultant on system and software architecture with over 12 years of experience as a freelance and 20 years in the field. I have a passion for creating innovative and user-friendly applications. I specialize in using the open-source Kivy framework to develop desktop and mobile applications, but I am also skilled in other technologies and frameworks.

SEEKING WORK | France (UTC-1) | Remote | Full stack developer

My name is Mathieu Virbel, and I am a consultant on system and software architecture with over 12 years of experience as a freelance and 20 years in the field. I have a passion for creating innovative and user-friendly applications. I specialize in using the open-source Kivy framework to develop desktop and mobile applications, but I am also skilled in other technologies and frameworks.

I worked on a variety of subjects, from Interactives and mobile application for Museum and Public Institutions, Embedded system in security company, telecommunication, and Startups environments from scratch. Recently playing with Python, Golang, VueJS 3/Typescript, InfluxDB, Docker Swarm, as well as writing specifications and reviewing code of others contractors.

Technologies: Python (django, flask, tensorflow, Kivy, …), Golang, TypeScript, VueJS, Quasar, Docker, Docker Swarm, Terraform, Ansible, MongoDB, InfluxDB, MariaDB, SQLite, Kafka, Prometheus/Graphana

Résumé/CV: https://meltingrocks.com/cv

LinkedIn: https://www.linkedin.com/in/mathieuvirbel/

Website: https://meltingrocks.com

Email: [email protected]

Notable Projects: Kivy ( https://kivy.org/ )