Dokuwiki - python:programmes
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2026-05-02T12:25:39+00:00Dokuwiki
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https://wiki.velannes.com/_media/wiki:dokuwiki.svgtext/html2019-07-12T19:12:37+00:00Anonymous (anonymous@undisclosed.example.com)affichage
https://wiki.velannes.com/python:programmes:affichage?rev=1562958757&do=diff
Gérer l'affichage avec Python
format (python 3)
* Le premier nombre correspond à la première variable dans format
* Les : permettent de séparer la variable de ses fonctions d'affichage
* Le signe < permet d'aligner à gauche
* Le signetext/html2017-05-31T22:34:01+00:00Anonymous (anonymous@undisclosed.example.com)asynchrone_functions
https://wiki.velannes.com/python:programmes:asynchrone_functions?rev=1496270041&do=diff
Décorateur pour rendre une fonctionne asynchrone
Source : <https://pykodz.wordpress.com/2010/11/15/async-decorator/>
#!/usr/bin/env python
# -*- coding: utf-8 -*-
from threading import Thread
from time import sleep
class async(Thread):
def __init__(self, callback, errback):
super(async, self).__init__()
self.callback = callback
self.errback = errback
def __call__(self, func):
# à l'appel de la fonction, on récupère juste la fonction
# et ses…text/html2013-04-10T17:13:37+00:00Anonymous (anonymous@undisclosed.example.com)browser_emulation
https://wiki.velannes.com/python:programmes:browser_emulation?rev=1365614017&do=diff
Simuler un navigateur avec Python
* mechanize : <https://pypi.python.org/pypi/mechanize/>
* spynner : <https://pypi.python.org/pypi/spynner/>
* selenium : <https://pypi.python.org/pypi/selenium/>text/html2017-06-01T11:02:15+00:00Anonymous (anonymous@undisclosed.example.com)classes_heritage_exemple
https://wiki.velannes.com/python:programmes:classes_heritage_exemple?rev=1496314935&do=diff
Exemple d'héritage de classe
class parent1:
def __init__(self):
print("init parent1")
self.var1 = 'myvar1'
def defParent1(self):
print('defParent1')
def test(self):
print('parent1')
class parent2:
def __init__(self):
print("init parent2")
self.var2 = 'myvar2'
def defParent2(self):
print('defParent2')
def test(self):
print('parent2')
class child(parent1, parent2):
def __init__(self):
print(…text/html2015-08-01T09:58:59+00:00Anonymous (anonymous@undisclosed.example.com)convert_dict_object
https://wiki.velannes.com/python:programmes:convert_dict_object?rev=1438423139&do=diff
Conversion d'objet en dict et inversement
* Source
Conversion d'un objet en dict
#!/usr/bin/env python
class Person(object):
def __init__(self, age, name):
self.age = age
self.name = name
Exemple :
>>> a = Person('GigiX', 30)
>>> a.__dict__
{ 'name' : 'GigiX', 'age' : 30 }text/html2013-12-03T21:42:23+00:00Anonymous (anonymous@undisclosed.example.com)deactivate_traceback
https://wiki.velannes.com/python:programmes:deactivate_traceback?rev=1386106943&do=diff
Désactiver traceback
sys.tracebacklimit=0text/html2014-02-15T19:16:03+00:00Anonymous (anonymous@undisclosed.example.com)dump_object
https://wiki.velannes.com/python:programmes:dump_object?rev=1392491763&do=diff
DUMP
Objet
from inspect import getmembers
from pprint import pprint
pprint(getmembers(object))
Module
dir(module)text/html2013-03-12T22:17:36+00:00Anonymous (anonymous@undisclosed.example.com)exec_cmd2
https://wiki.velannes.com/python:programmes:exec_cmd2?rev=1363126656&do=diff
Lancer un programme externe
commands.getstatusoutput retourne le code de retour et l'output.
* Avec python2
>>> import commands
>>> ret, output = commands.getstatusoutput('ls -l')
>>> print(ret)
0
>>> print(output)
total 12
drwxr-xr-x 2 gigi users 4096 9 janv. 00:24 Desktop
drwxr-xr-x 5 gigi users 4096 16 févr. 23:06 Documents
drwxr-xr-x 2 gigi users 4096 18 févr. 14:24 Downloadstext/html2013-06-01T23:31:32+00:00Anonymous (anonymous@undisclosed.example.com)file_read
https://wiki.velannes.com/python:programmes:file_read?rev=1370129492&do=diff
Lire un fichier ligne par ligne en utilisant les iterations
with open('mydata.txt') as fp:
for line in iter(fp.readline, ''):
process_line(line)text/html2019-07-29T17:27:37+00:00Anonymous (anonymous@undisclosed.example.com)find
https://wiki.velannes.com/python:programmes:find?rev=1564421257&do=diff
Chercher un fichier ou dossier
os.walk
import os, fnmatch
def locate(pattern, root=os.curdir):
'''Locate all files matching supplied filename pattern in and below
supplied root directory.'''
for path, dirs, files in os.walk(os.path.abspath(root)):
for filename in fnmatch.filter(files, pattern):
yield os.path.join(path, filename)text/html2013-03-23T19:26:41+00:00Anonymous (anonymous@undisclosed.example.com)grouper_chaines_listes
https://wiki.velannes.com/python:programmes:grouper_chaines_listes?rev=1364066801&do=diff
Exemples
>>> '.'.join([''.join(a) for a in zip(*[iter(tel)]*2)])
'06.12.34.56.78'
>>> import itertools
>>> liste = [1, 2 ,3, 4, 5, 6, 7, 8, 8, 10, 11, 12, 13, 14]
>>> list(itertools.izip_longest(*[iter(liste)]*3))
[(1, 2, 3), (4, 5, 6), (7, 8, 8), (10, 11, 12), (13, 14, None)]text/html2013-03-12T23:06:01+00:00Anonymous (anonymous@undisclosed.example.com)indentation
https://wiki.velannes.com/python:programmes:indentation?rev=1363129561&do=diff
Réindenter un script Python
Ce script permet de réindenter un script python avec au choix les tabulations ou les espaces.
./reindent.py <fichier à réindenter> <fichier de sortie> [tab|space] [nombre]
Exemple pour réindenter le fichier toto.py en mettant 3 espaces pour la réindentation :text/html2013-03-23T20:10:16+00:00Anonymous (anonymous@undisclosed.example.com)listes_operations
https://wiki.velannes.com/python:programmes:listes_operations?rev=1364069416&do=diff
Exemples :
# Multiplie les nombres de la liste au carré
>>> map(lambda x: x**2, range(10))
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]
# N'affiche que les nombres de la liste qui sont divisibles pas 2
>>> filter(lambda x: x % 2 == 0, range(10))
[0, 2, 4, 6, 8]
# N'affiche que les nombre de la liste qui sont divisibles par 2 et les multiplie au carré
>>> map(lambda x: x**2, filter(lambda y: y % 2 == 0, range(10)))
[0, 4, 16, 36, 64]text/html2014-02-22T17:17:23+00:00Anonymous (anonymous@undisclosed.example.com)multiple_loop_in_one
https://wiki.velannes.com/python:programmes:multiple_loop_in_one?rev=1393089443&do=diff
Boucles optimisées avec condition
[z for b in a for c in b for d in c ... for z in y]
Which would be like having this regular for-loop:
for b in a:
for c in b:
for d in c:
...
for z in y:
# have ztext/html2013-03-12T23:07:47+00:00Anonymous (anonymous@undisclosed.example.com)multiprocessing1
https://wiki.velannes.com/python:programmes:multiprocessing1?rev=1363129667&do=diff
Pourquoi il faut utiliser le multiprocessing et non le threading sous python : <http://blog.unix4fun.net/post/2007/09/17/python-le-GIL-pourquoi-et-comment-faire>
Module multiprocessing
Méthode avec Pool :
#!/usr/bin/env python
from multiprocessing import Pool, cpu_count
from time import sleep
def f(x,y):
sleep(2)
return x*y
def k(x,y):
sleep(2)
return x+y
if __name__ == '__main__':
result=[]
pool = Pool(processes = cpu_count()) # start x worker processes
resu…text/html2013-03-12T22:19:13+00:00Anonymous (anonymous@undisclosed.example.com)replace
https://wiki.velannes.com/python:programmes:replace?rev=1363126753&do=diff
Remplacer une chaine
>>> import re
>>> re.sub('(^\s*%s\s*%s\s*).*' % ('ip', '='), lambda m: "%s%s" % (m.group(1), '127.0.0.2'), 'ip=127.0.0.1')text/html2014-02-09T10:57:17+00:00Anonymous (anonymous@undisclosed.example.com)show_permissions
https://wiki.velannes.com/python:programmes:show_permissions?rev=1391943437&do=diff
Permission
>>> oct(os.stat("toto.txt").st_mode & 0777)
'0644'
>>> oct(stat.S_IMODE(os.lstat("toto.txt").st_mode))
'0644'
>>> os.stat("toto.txt").st_uid
0
>>> os.stat("toto.txt").st_gid
0text/html2014-02-21T23:34:26+00:00Anonymous (anonymous@undisclosed.example.com)sort_array
https://wiki.velannes.com/python:programmes:sort_array?rev=1393025666&do=diff
Trier un tableau
Tous les exemples : <https://wiki.python.org/moin/HowTo/Sorting>
>>> Lf = ['ACBD', 'AABB', 'ABBB','ACBD','ACBD','ABBB']
>>> Li = ['ACBD', 'AAAB', 'AABB','ACBD','ACBD','AABB']
>>> Ltemp = Li+ Lf
>>> Lt = sorted([(x, Ltemp.count(x)) for x in set(Ltemp)])
>>> print Lt
[('AAAB', 1), ('AABB', 3), ('ABBB', 2), ('ACBD', 6)]text/html2013-03-16T17:50:12+00:00Anonymous (anonymous@undisclosed.example.com)swap
https://wiki.velannes.com/python:programmes:swap?rev=1363456212&do=diff
Afficher la swap consommée par les processus
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Ghislain LE MEUR
import os, operator, sys, pwd
procPath = '/proc'
def bytes2human(n):
symbols = (' MB', ' GB', ' TB', ' PB', ' EB', ' ZB', ' YB')
prefix = {}
for i, s in enumerate(symbols):
prefix[s] = 1 << (i+1)*10
for s in reversed(symbols):
if n >= prefix[s]:
value = float(n) / prefix[s]
return '%.2f%s' % (value, s)
return "%s KB" % n
def lsPid():
return [int(_x) f…text/html2013-06-04T20:34:46+00:00Anonymous (anonymous@undisclosed.example.com)timeout
https://wiki.velannes.com/python:programmes:timeout?rev=1370378086&do=diff
Timeout
from functools import wraps
import errno
import os
import signal
class TimeoutError(Exception):
pass
def timeout(seconds=10, error_message=os.strerror(errno.ETIME)):
def decorator(func):
def _handle_timeout(signum, frame):
raise TimeoutError(error_message)
def wrapper(*args, **kwargs):
signal.signal(signal.SIGALRM, _handle_timeout)
signal.alarm(seconds)
try:
result = func(*args, **kwargs)
…text/html2014-02-20T22:48:52+00:00Anonymous (anonymous@undisclosed.example.com)twisted_ssh_server
https://wiki.velannes.com/python:programmes:twisted_ssh_server?rev=1392936532&do=diff
Twisted SSH Server
#!/usr/bin/env python
# Ghislain LE MEUR
import twisted.cred as cred, twisted.cred.credentials, twisted.cred.checkers, twisted.cred.portal
import twisted.conch as conch, twisted.conch.recvline, twisted.conch.avatar, twisted.conch.checkers, twisted.conch.ssh, twisted.conch.ssh.factory, twisted.conch.ssh.session
import twisted.internet as internet, twisted.internet.defer
import twisted.application as application
from twisted.python.randbytes import secureRandom
from twisted.py…text/html2014-02-20T23:05:19+00:00Anonymous (anonymous@undisclosed.example.com)twisted_ssl_server
https://wiki.velannes.com/python:programmes:twisted_ssl_server?rev=1392937519&do=diff
Authentification par certificat SSL avec twisted et openssl
Serveur
#!/usr/bin/env python
# Author : Ghislain LE MEUR
try:
import sys, os, socket, shutil, logging
from OpenSSL import SSL, crypto
from twisted.internet.protocol import Factory, Protocol
from twisted.internet import ssl, reactor
from twisted.python import log
except Exception as e:
print('%s', e)
sys.exit(1)
port = 8000
ssl_dir = os.path.join(os.path.dirname(sys.argv[0]), …