Mobile OS alternatives and european sovereignty

Tue 04 May 2021
Sailfish (not OS) (photo credit: wikipedia)

OS for mobile devices has evolved over the pasts years. Once, European actors (e.g. Nokia) were in lead position. Now it's hard to find non-android mobile OS. Each OS mobile comes with its software and hardware environements, and its geopolitical considerations.

Here is a report on the Strategy Behind Sovereign Mobile Operating Systems Adoption.

Category: tools Tagged: smartphone geopolitics

Cache implementation using weakref

Fri 30 April 2021
Bird's cache (Photo credit: Wikipedia)

This article presents a quick example of how to use weakref to implement a home-made cache mechanism.

Let's use the following use case:

  • Let's consider items:
    • items can be stored on a storage
    • items can be retrieved from storage
    • items are identify by an ID …

Category: how to Tagged: python cache weakref

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Tkinter and Asyncio

Thu 18 February 2021
Asynchronous process results waiting (Photo credit: Wikipedia)

Graphical interfaces are typically the kind of object that can take advantage of asynchrounous programming as a GUI spend lot of time waiting for user input.

Tkinter <>_ is a kind of standard for …

Category: how to Tagged: python asyncio

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Latex generator using Jinja

Wed 11 November 2020
Kawasukune-jinja (Photo creadit: Wikipedia)

The goal is to generate a PDF file using python. I decided to generate \(\LaTeX\).


I decided to use jinja as its documentation mention it.

\begin{equation*} \boxed{\text{Jinja template}} \xrightarrow[\text{python}]{} \boxed{\LaTeX} \xrightarrow[\text{pdflatex}]{} \boxed{\text{PDF}} \end{equation*}

The …

Category: LaTeX Tagged: python LaTeX Jinja

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Travis setup

Tue 12 May 2020
One job in continuous integration pipeline (Photo credit: Wikipedia)

The goal is to setup a CI pipeline based on Travis with external dependencies integrated to a Github repository

Travis basics

To enable Travis integration in Github, one must edit ./.travis.yml file.

I won't go into detail. The setup is …

Category: how to Tagged: travis ci how to

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Wikidata crawling

Sun 26 April 2020
Graph database representation (Photo credit: Wikipedia)

I wish to have reliable data about vehicles. I decided to rely on one large source, namely Wikipedia. I chose it because it is reviewable and most of the time reviewed, and regularly updated and completed.

Wikipedia - Wikidata relationship

Wikidata items are made to …

Category: how to Tagged: python wikipedia wikidata html

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Differential equation in python

Sat 04 April 2020
Second order differential equation (Photo credit: Wikipedia)

In python, differential equations can be numerically solved thanks to scipy [1]. Is usage is not as intuitive as I expected.

Simple equation

Let's start small. The first equation will be really simple:

\begin{equation*} \frac{\partial{f}}{\partial{t}} = a \times f …

Category: maths Tagged: python maths equation

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Zombie propagation

Sat 21 March 2020
Zombie favorite food warning (Photo credit: wikipedia)

I recently read a paper [1] trying to model a disease propagation. I wanted to play with this model.

The model

The model is know as "SIR" as it divide the population into 3 groups:

  • S: suceptible to become a zombie
  • I: infected …

Category: maths Tagged: python maths zombie

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