On this site you will learn data visualization with Python. You will find code examples of Python graphs made with matplotlib, seaborn, plotly and other packages

• « Le Frido » contient des mathématiques du niveau de l'agrégation. Il couvre (à peu près) tout le programme.

• « Giulietta » contains more or less everything I know in mathematics.

This document is a compilation of many stuff I wrote during my mathematical live. There are mainly three parts :
— Exercises for undergrad (in French).
— Theory for undergrad (in French, mainly devoted to l’agrégation)
— Theory I studied during my thesis (in English)
— Some research material (the BTZ part, in English)

Il existe de nombreux logiciels de mathématique. Notre préféré est Sage pour une raison très précise : Sage est (en simplifiant) un module pour python. Donc quand on travaille en Sage, on dispose de tout Python.

Initiation ludique, pédagogique & gratuite à la programmation en Python !

Ce projet est issu d'une thèse en didactique de l'informatique de Matthieu Branthom portant sur l'enseignement-apprentissage de la programmation informatique dans l'enseignement secondaire

Découvert via @sebsauvage : https://sebsauvage.net/links/?EiFcHg

Un site pédagogique pour apprendre les bases de Python sous forme de jeu: notion de variables, exécution conditionnelle, boucles.
Et les équivalents Scratch sont même indiqués.

fpdf2 is a simple & fast PDF creation library for Python that I have been maintaining since mid-2020.

In this article, I'm going to present some of the new features that landed since my last post on the subject. Hence, this will cover versions 2.5.0, 2.5.1 & 2 …

Added

• new parameters new_x and new_y for cell() and multi_cell(), replacing ln=0, thanks to @gmischler
• new add_highlight() method to insert highlight annotations: documentation
• new offset_rendering() method: documentation
• new .text_mode property: documentation
• the page structure of the documentation has been revised, with a new page about adding text, thanks to @gmischler
• a warning is now raised if a context manager is used inside an unbreakable() section, which is not supported

Changed

• local_context() can now "scope" even more properties, like blend_mode: documentation

Fixed

• No font properties should be leaked anymore after using markdown or in any other situations (cf. #359), thanks to @gmischler
• If multi_cell(align="J") is given text with multiple paragraphs (text followed by an empty line) at once, it now renders the last line of each paragraph left-aligned,
  instead of just the very last line (cf. #364), thanks to @gmischler
• a regression: now again multi_cell() always renders a cell, even if txt is an empty string - cf. #349
• a bug with string width calculation when Markdown is enabled - cf. #351
• a few bugs when parsing some SVG files - cf. #356, #358 & #376
• a bug when using multi_cell(..., split_only=True) inside an unbreakable section - cf. #359

Deprecated

• The parameter ln to cell() and multi_cell() is now deprecated, use new_x and new_y instead.
• The parameter center to cell() is now deprecated, use align="C" instead.

Displaying deprecation warnings

DeprecationWarnings are not displayed by Python by default.

Hence, every time you use a newer version of fpdf2, we strongly encourage you to execute your scripts
with the -Wd option (cf. documentation)
in order to get warned about deprecated features used in your code.

This can also be enabled programmatically with warnings.simplefilter('default', DeprecationWarning).

TL;DR version of lessons from the post:

1. Writing open source software can be very rewarding in ways you can’t predict
2. Be in it for the long haul
3. Ship it and ship regularly
4. Have broad, open-ended goals
5. If you care enough, you’ll find the time
6. No one cares about your unit test coverage
7. There’s no shame in marketing
8. Clear it with your employer
9. Foster community
10. Keep it enjoyable

Source: https://www.reddit.com/r/Python/comments/smta85/lessons_learned_from_my_10_year_open_source/

Can't I just get the data, without it being turned into objects?
We'll use this mechanism to convert tagged nodes to almost-native types, while preserving the tags.

It's likely possible to handle [undefined tag prefixes and undefined aliases] in a way similar to how we handled undefined tags

A very clear and detailed article!

Les notebooks Colab sont des notebooks Jupyter hébergés par Colab.

Bank Python implementations are effectively proprietary forks of the entire Python ecosystem which are in use at many (but not all) of the biggest investment banks. Bank Python differs considerably from the common, or garden-variety Python that most people know and love (or hate).

I've said so far that a lot of data is stored in Barbara. Time to drop a bit of a bombshell: the source code is in Barbara too, not on disk. Remain composed. It's kept in a special Barbara ring called sourcecode.

it's possible to sit down, write a script and get it running in prod within the hour, which is a big deal.

Using simple Python functions, in a source controlled system, is a better middle ground than the modern-day equivalent of J2EE.

One thing I regret about software as a field is how little time is spent learning from existing systems and judging what they did well, or badly. There are only a small number of books discussing, in detail, real systems that exist.

Cette année, grâce à @kleph qui m'en a parlé, je participe au Advent of Code :

Advent of Code is an Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like. People use them as a speed contest, interview prep, company training, university coursework, practice problems, or to challenge each other.

You don't need a computer science background to participate - just a little programming knowledge and some problem solving skills will get you pretty far. Nor do you need a fancy computer; every problem has a solution that completes in at most 15 seconds on ten-year-old hardware.

Ce cours a pour but de t’apprendre à parler le Python. Il s’agit d’un langage particulier — un langage de programmation — pour communiquer avec ton ordinateur afin de lui demander de réaliser des tâches précises (comme exécuter un calcul, récupérer des événements du clavier, afficher une image à l’écran, etc.), c’est-à-dire exécuter un programme informatique (un logiciel).

Last month, I realized late that October was hacktoberfest month!

This online event is a month-long celebration (October 1-31) of open source software run in partnership with different software companies, with a focus on encouraging contributions to open source projects.

While I participated in the 2019 edition as a contributor …

Learning the best way of combining your love for math and programming

GitHub repo: https://github.com/ManimCommunity/manim

Examples: https://docs.manim.community/en/latest/examples.html

The other day, while watching La Carte aux trésors at my elderly neighbor's house, I casually played peg solitaire on a board she has.

After many failures at trying to get rid of all pawns but one, I started to wonder about the mathematics & algorithmics behind that game...

Back home …

cf. https://fr.wikipedia.org/wiki/Fichier_de_test_Eicar

X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*

FROM: https://sebsauvage.net/links/?0rGdAQ

Pour vous amuser à en créer en Python, avec fpdf2:

#!/usr/bin/env python3
# REQUIRE: pip install fpdf2 pdf417 qrcode
import fpdf, pdf417, qrcode
EICAR = 'X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*'
pdf = fpdf.FPDF()
pdf.add_page()
pdf.set_font("Helvetica", size=30)
pdf.text(90, 20, "EICAR")
pdf.text(10, 60, "PDF-417:")
pdf.image(pdf417.render_image(pdf417.encode(EICAR)), x=10, y=60)
pdf.text(10, 140, "QRCode:")
pdf.image(qrcode.make(EICAR).get_image(), x=35, y=145)
pdf.output("eicar.pdf")

Ce blog voit l'apparition d'une nouvelle page permanente : Images libres de droits.

Cette page recense des site web, des illustrateurs, des icônes et des polices de caractères libres de droits.

Depuis octobre 2018, j'ai rassemblé une liste d'artistes dont j'apprécie le travail et qui placent leurs œuvres sous licence Creative …

À oui.sncf, je travaille au sein d'une équipe en charge de l'usine logicielle, qui administre depuis des années une instance Gitlab self-hosted.

Cet article contient quelques-unes de nos recommandations à l'intention des utilisateurs de notre Gitlab, ayant pour but à la fois améliorer les performances de leurs pipelines …

Détail des informations stockées dans le QR Code du pass vaccinal européen

#!/usr/bin/env python3
import sys
import zlib
import pprint
# Modules tiers (Pillow, Pyzbar, base45, cbor2)
import PIL.Image
import pyzbar.pyzbar
import base45
import cbor2

img = PIL.Image.open("qrcode.png")
data = pyzbar.pyzbar.decode(img)
cert = data[0].data.decode()
b45data = cert.replace("HC1:", "")
zlibdata = base45.b45decode(b45data)
cbordata = zlib.decompress(zlibdata)
decoded = cbor2.loads(cbordata)
print("Header\n----------------");
pprint.pprint(cbor2.loads(decoded.value[0]))
print("\nPayload\n----------------");
pprint.pprint(cbor2.loads(decoded.value[2]))
print("\nSignature ?\n----------------");
print(decoded.value[3])

I have been amazed recently at the diversity of contributors on the fpdf2 project, coming from all around the world!

Then I thought it would be nice to visualize this diversity by building a world map of all contributors locations. There it is:

Click on the image to access an …