### Approval voting

###### Fri 22 April 2022
Children approving their teacher (Photo credit: Wikipedia)

This article is an update of the the previous one. It adds the approval voting method and fix few errors.

## Method explanation

Each voter can apprrove as many candidate as he wants. It can be seen as a majority judgement with only two possible notes. It can also be presented as the same process as a time management system (such as doodle).

## Implementation

To compare with other methods, I start with the ballots for majority judgment and for each ballot approve all candidates whose note is above a threshold.

def jm_to_approval(jm_vote):
"""transform vote for "juement majoritaire" to approval list."""
notes = MajorityJudgement.notes
values = dict(zip(notes, range(7)))
return [name for name, appr in jm_vote.items() if values[appr] < 4]


For the rest, simple counters are enough:

• to count number for each candidate
• to count the total number of voters

Graphical representation rely on plot bar.

## Results

The results can be different from the one from other voting methods. I'm surprised by the difference between Borda method and approval method. In Borda method, the candidates after the third one have really few points compared to the first ones. In the approval method, if a voter approve 4 candidates, all those candidates have the same approval (no distinction between them).

Approval method
Borda method (same votes)

This may also come from the threshold I put. I choose this threshold because I think a voter approve all the OK. Nevertheless, it seems the number of approval (archive) can be less than expected (less than 2 approval in average). I find this number really really low. Perhaps it is due to the political offer that does not correspond to voters expectations.

Category: python Tagged: geopolitics python vote

### 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 <https://docs.python.org/3/library/tkinter.html#module-tkinter>_ is a kind of standard for graphical …

Category: how to Tagged: python asyncio

### 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 $$\LaTeX$$.

## Pipeline

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

### Wikipedia crawling (part II)

###### Thu 11 June 2020
Crawling (Photo credit: Wikipedia)

This article is the follow up of the one about wikidata crawling.

Wikipedia has specific infobox templates. This is the normalized way to enter specification inside wikipedia articles. It provides templates with already defined fields. For example the planet template has fields such as periapsis or …

Category: how to Tagged: python wikipedia html data retrieval

### 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

### 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

### 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