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This commit is contained in:
2020-05-05 09:53:14 +02:00
parent 0e4c9c0fea
commit 7de4bab059
1411 changed files with 163444 additions and 0 deletions

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{
"cells": [
{
"cell_type": "code",
"execution_count": 27,
"metadata": {},
"outputs": [],
"source": [
"def binaire2decimal(chaine):\n",
" ans = 0\n",
" for c in chaine:\n",
" print(c)\n",
" ans = ans*2+int(c)\n",
" return ans"
]
},
{
"cell_type": "code",
"execution_count": 29,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"1\n",
"0\n",
"0\n"
]
},
{
"data": {
"text/plain": [
"4"
]
},
"execution_count": 29,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"binaire2decimal(\"100\")"
]
},
{
"cell_type": "code",
"execution_count": 47,
"metadata": {},
"outputs": [],
"source": [
"def decimal2binaire(nombre):\n",
" binaire = []\n",
" reste = nombre\n",
" while reste:\n",
" binaire.append(reste % 2)\n",
" reste = reste // 2\n",
" return binaire[::-1]"
]
},
{
"cell_type": "code",
"execution_count": 48,
"metadata": {},
"outputs": [
{
"data": {
"text/plain": [
"[1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0]"
]
},
"execution_count": 48,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"decimal2binaire(1234)"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.8.1"
}
},
"nbformat": 4,
"nbformat_minor": 2
}

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#! /usr/bin/env python3
"""
python3 demo_test2.py
"""
__author__ = "Laure Gonnord"
__copyright__ = "Univ Lyon1, 2019"
## fortement inspiré de http://sdz.tdct.org/sdz/du-decimal-au-binaire.html
CHIFFRES = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
NOMBRES = {c: n for (n, c) in enumerate(CHIFFRES)}
# Fonctions utilitaires
def chiffre(n):
return CHIFFRES[n]
def nombre(ch):
"""ch= caractère qui désigne le nombre
retourne le nombre associé"""
return NOMBRES[ch]
chiffre(12) # 'C'
nombre('C') # 12
# base b vers décimal
def lire_repr(rep, b):
nb_chiff = len(rep)
somme = 0
# TODO
return somme
print(lire_repr('2A',16))
# représentation du nombre n en base b, retourne une chaîne
# à chaque fois on ajoute à la fin de la chaîne.
def repr_nombre(n, b):
pass
print(repr_nombre(10, 2)) # 1010
print(repr_nombre(42, 16)) # 2A

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#! /usr/bin/env python3
"""
python3 demo_repnombres.py
"""
__author__ = "Laure Gonnord"
__copyright__ = "Univ Lyon1, 2019"
# expérimentations autour de la représentation des nombres en python
x = bin(42)
print(type(x)) # c'est une chaîne
print(x)
y = hex(54)
print(y)
z = 67
# on peut utiliser le formattage python pour imprimer les rep.
print("my num is 0x{0:02x}".format(z))