Taller II Coreis Python 13112009

Taller II Python Carlos Mauro Cárdenas Fernández http://unimauro.blogspot.com http://www.twitter.com/unimauro [email_address]

Thumbnails con PIL import os, sys, Image size = 128, 128 for infile in sys.argv[1:]: outfile = os.path.splitext(infile)[0] + "-thumbnail.jpg" try: im = Image.open(infile) im.thumbnail(size) im.save(outfile, "JPEG") except IOError: print "no se puede con", infile

https://cirl.berkeley.edu/view/Py4Science

Características deseables de un lenguaje para uso en ciencia. Libre y gratuito.

Tipo de datos versátiles (alto nivel).

Biblioteca completa (incorporada y disponible externamente).

Matemática NumPy: Manejo de matrices N-dimensionales.

Números aleatorios sofisticados

Herramientas para integrar código C++ y Fortran Matplotlib: “framework para crear gráficos científicos similares a las herramientas provistas por Matlab”.

Interfase: GNUPLOT, R, MATLAB.

t200.py import numpy as np import matplotlib.pyplot as plt import matplotlib.mlab as mlab mu, sigma = 100, 15 x = mu + sigma * np.random.randn(10000) fig = plt.figure() ax = fig.add_subplot(111) n, bins, patches = ax.hist(x, 50, normed=1, facecolor='green', alpha=0.75) bincenters = 0.5*(bins[1:]+bins[:-1]) y = mlab.normpdf( bincenters, mu, sigma) l = ax.plot(bincenters, y, 'r--', linewidth=1) ax.set_xlabel('Smarts') ax.set_ylabel('Probability') ax.set_xlim(40, 160) ax.set_ylim(0, 0.03) ax.grid(True) plt.show()

from matplotlib import rcParams rcParams['text.usetex']=True rcParams['text.latex.unicode']=True from numpy import arange, cos, pi from matplotlib.pyplot import figure, axes, plot, xlabel, ylabel, title, grid, savefig, show figure(1, figsize=(6,4)) ax = axes([0.1, 0.1, 0.8, 0.7]) t = arange(0.0, 1.0+0.01, 0.01) s = cos(2*2*pi*t)+2 plot(t, s) xlabel(r'\textbf{time (s)}') ylabel(ur'\textit{Velocity (\u00B0/sec)}', fontsize=16) title(r"\TeX\ is Number $\displaystyle\sum_{n=1}^\infty\frac{-e^{i\pi}}{2^n}$!", fontsize=16, color='r') grid(True) show() t201.py

t202.py #!/usr/bin/env python import numpy as np import matplotlib.pyplot as plt t = np.arange(0.0, 1.01, 0.01) s = np.sin(2*2*np.pi*t) plt.fill(t, s*np.exp(-5*t), 'r') plt.grid(True) plt.show()

t203.py import matplotlib.pyplot as plt import numpy as np from numpy.random import randn fig = plt.figure() ax = fig.add_subplot(111) data = np.clip(randn(250, 250), -1, 1) cax = ax.imshow(data, interpolation='nearest') ax.set_title('Gaussian noise with vertical colorbar') cbar = fig.colorbar(cax, ticks=[-1, 0, 1]) cbar.ax.set_yticklabels(['< -1', '0', '> 1']) fig = plt.figure() ax = fig.add_subplot(111) data = np.clip(randn(250, 250), -1, 1) cax = ax.imshow(data, interpolation='nearest') ax.set_title('Gaussian noise with horizontal colorbar') cbar = fig.colorbar(cax, ticks=[-1, 0, 1], orientation='horizontal') cbar.ax.set_xticklabels(['Low', 'Medium', 'High']) plt.show()

t204.py import numpy as np import matplotlib.pyplot as plt import matplotlib.path as path import matplotlib.patches as patches fig = plt.figure() ax = fig.add_subplot(111, frameon=False, xticks=[], yticks=[]) im = ax.imshow(np.random.rand(10,10)) patch = patches.Circle((300,300), radius=100) im.set_clip_path(patch) plt.show()

Matemática Interfases: GNUPLOT, R, MATLAB: FNUPlot-py, Rpy, PyMAT

http://neopythonic.blogspot.com

Python in the Scientific World * Rapid classification of astronomical time-series data, by Josh Bloom, UCB Astronomy Dept. One of the many tools using Python is GroupThink, which lets random people on the web help classify galaxies (more fun than watching porn :-). * The Hubble Space Telescope team in Baltimore has used Python for 10 years. They showed a tool for removing noise generated by cosmic rays from photos of galaxies. The future James Webb Space Telescope will also be using Python. (Perry Greenfield and Michael Droettboom, of STSCI.) * A $1B commitment by the Indian government to improve education in India includes a project by Prabhu Ramachandran of the Department of Aerospace Engineering at IIT Bombay for Python in Science and Engineering Education in India (see http://fossee.in/).

fperez.org/py4science/2009_guido_ucb/index.html

http://sourceforge.net/projects/mysql-python/

01mysql.py #!/usr/local/bin/python #from sets import ImmutableSet import MySQLdb import os, sys db = MySQLdb.connect( host ="localhost", user = "root", passwd = "123456", db = "extdbcat" ) cursor = db.cursor () f = open("archivo.csv","r") for i in range(1,1050): x = f.readline() f.close() db.close()

http://pymssql.sourceforge.net/

01pymysql.py import pymssql import time import string import unicodedata import codecs conn = pymssql.connect(host='xxx', user='xxx', password='xxx', database='xxxx') c=conn.cursor() for i in range(1): try: c.execute("Sentencia") result1=c.fetchall() r1 = c.fetchone() while r1: a=r1[0]+" , "+r1[1]+" ,student"+"\n" print a r1=c.fetchone()

01pymysqlmejorando.py for i in range(1): try: c.execute("sql") result1=c.fetchall() r1 = c.fetchone() while r1: a=r1[0]+" , "+r1[1]+" ,student"+"\n" print a r1=c.fetchone() except pymssql.DatabaseError, err: print str(err) print "Un error en la sesion de la DB " conn.close() break except pymssql.DatabaseError, err: print str(err) print "Fail" time.sleep(0.2) except: print "Fail" time.sleep(0.2)

http://python.projects.postgresql.org/

Postgresql Conn import datetime connection = psycopg.connect('dbname=COREIS', 'user=roort') mark = connection.cursor() st = 'INSERT INTO ' + table + ' (' + columns + ') VALUES (' + values + ')' mark.execute(st) connection.commit()

http://wiki.python.org/moin/WebProgramming

ServidorWeb.py #!/usr/bin/python from BaseHTTPServer import HTTPServer from SimpleHTTPServer import SimpleHTTPRequestHandler HTTPServer(('localhost', 8000), SimpleHTTPRequestHandler).serve_forever()

Otro Ejemplo def handle_request(environment, start_response): start_response('200 OK', [('content-type', 'text/html')]) return ['Hello, World!'] if __name__ == '__main__': from wsgiref import simple_server simple_server.make_server('', 8080, handle_request).serve_forever()

00web.py-01 from wsgiref import util from string import Template # Templates wrapper = Template(""" <html><head><title>$title</title></head><body> $body </body></html> """)

00web.py-02 four_oh_four = Template(""" <html><body> <h1>404-ed!</h1> La URL <i>$url</i> No fue Encontrada. </body></html>""")

00web.py-03 pages = { 'index': { 'title': "Hola COREIS", 'body': """NUESTRA WEB EN PYTHON <a href="this_page">COREIS</a>?""" }, 'this_page': { 'title': "COREIS", 'body': """Vamos al coreis. <a href="http://www.coreislima.org/">COREIS</a>?""" } }

00web.py-04 def handle_request(environment, start_response): try: fn = util.shift_path_info(environment) if not fn: fn = 'index' response = wrapper.substitute(**pages[fn]) start_response('200 OK', [('content-type', 'text/html')]) except: start_response('404 Not Found', [('content-type', 'text/html')]) response = four_oh_four.substitute(url=util.request_url(environ)) return [response]

00web.py-05 if __name__ == '__main__': from wsgiref import simple_server print("Starting server on port 8080...") try: simple_server.make_server('', 8080, handle_request).serve_forever() except KeyboardInterrupt: print("Ctrl-C Para Salir...")

email.py-01 import smtplib from email.MIMEMultipart import MIMEMultipart from email.MIMEBase import MIMEBase from email.MIMEText import MIMEText from email.Utils import COMMASPACE, formatdate from email import Encoders import os

email.py-02 def sendMail(to, subject, text, files=[],server="localhost"): assert type(to)==list assert type(files)==list fro = "unimauro@gmail.com" msg = MIMEMultipart() msg['From'] = fro msg['To'] = COMMASPACE.join(to) msg['Date'] = formatdate(localtime=True) msg['Subject'] = subject msg.attach( MIMEText(text) ) for file in files: part = MIMEBase('application', "octet-stream") part.set_payload( open(file,"rb").read() ) Encoders.encode_base64(part) part.add_header('Content-Disposition', 'attachment; filename="%s"' % os.path.basename(file)) msg.attach(part) smtp = smtplib.SMTP(server) smtp.sendmail(fro, to, msg.as_string() ) smtp.close() sendMail( ["carlos.cardenas.f@upch.pe"], "hello","cheers", ["usuarios.sql","ThekeRS.doc"] )

email02.py-01 import smtplib import mimetypes from email.MIMEText import MIMEText from email.Encoders import encode_base64

email02.py-02 mensaje = MIMEText("""Prueba 2 Desde Python""") mensaje['From']="unimauro@gmail.com" mensaje['To']="carlos.cardenas.f@upch.pe" mensaje['Subject']="Prueba 2" # Establecemos conexion con el servidor smtp de gmail mailServer = smtplib.SMTP('smtp.gmail.com',587) mailServer.ehlo() mailServer.starttls() mailServer.ehlo() #mailServer.login("uio@gmail.com","password") mailServer.login("unimauro@gmail.com","esperanza1504") # Envio del mensaje mailServer.sendmail("usuario@gmail.com", "carlos.cardenas.f@upch.pe", mensaje.as_string())

Models Templates Admin Forms Auth i18n GIS Comments DataBrowse Syndication Sitemaps django-evolution django-registration django-jython django-authopenid django-tagging django-command-extensions google-app-engine-django django-search django-contact-form django-contact-form django-bookmarks django-photologue django-timezones django-profile django-mptt Caching Pinax Satchmo

# eldemo/elinux/models.py: from django.db import models from datetime import date class Noticia(models.Model): fecha = models.DateField( default=date.today) titulo = models.CharField(max_length=80) contenido = models.TextField()

class Expositor(models.Model): nombre = models.CharField(max_length=80, unique=True) foto = models.ImageField( upload_to="fotos") resena = models.TextField(null=True, blank=True) invitado = models.BooleanField()

class Charla(models.Model): titulo = models.CharField(max_length=120, unique=True) expositor = models.ForeignKey(Expositor)

BEGIN; CREATE TABLE "elinux_noticia" ( "id" serial NOT NULL PRIMARY KEY, "titulo" varchar(80) NOT NULL, "contenido" text NOT NULL ) ; CREATE TABLE "elinux_expositor" ( "id" serial NOT NULL PRIMARY KEY, "nombre" varchar(80) NOT NULL UNIQUE, "foto" varchar(100) NOT NULL, "resena" text NULL ) ; CREATE TABLE "elinux_charla" ( "id" serial NOT NULL PRIMARY KEY, "titulo" varchar(120) NOT NULL UNIQUE, "expositor_id" integer NOT NULL REFERENCES "elinux_expositor" ("id") DEFERRABLE INITIALLY DEFERRED ) ; CREATE INDEX "elinux_charla_expositor_id" ON "elinux_charla" ("expositor_id"); COMMIT;

# Python: class Charla(models.Model): titulo = models.CharField(max_length=120, unique=True) expositor = models.ForeignKey(Expositor) -- SQL: CREATE TABLE "elinux_charla" ( "id" serial NOT NULL PRIMARY KEY, "titulo" varchar(120) NOT NULL UNIQUE, "expositor_id" integer NOT NULL REFERENCES "elinux_expositor" ("id") DEFERRABLE INITIALLY DEFERRED ); CREATE INDEX "elinux_charla_expositor_id" ON "elinux_charla" ("expositor_id");

from django.contrib import admin from elinux.models import Noticia, Expositor, Charla admin.site.register(Expositor) admin.site.register(Charla) admin.site.register(Noticia)

¿Qué es Plone? Sistema de gestión de contenido web Escrito sobre Zope Programado en Python

Características de Plone como CMS Distintos tipos de contenido

Distintas formas de presentar el mismo contenido

Flujos de trabajo aplicables al contenido

Indexado de texto completo de archivos PDF/OO

Instalación de Plone Descargar Plone desde: http://launchpad.net/plone/3.3/3.3/+download/Plone-3.3-UnifiedInstaller.tgz Ejecutar la instalación: $ tar zxfv Plone-3.3-UnifiedInstaller.tgz $ cd Plone-3.3-UnifiedInstaller/ $ ./install.sh standalone Iniciar el servidor: $ cd $HOME/Plone/zinstance $ ./bin/instance fg Acceder a Plone desde el navegador en: http://localhost:8080/Plone

Instalación de Plone (para desarrollo) Virtualenv PasteScript ZopeSkel zc.buildout

Requerimientos Editar contenido fácilmente Múltiples usuarios Niveles de acceso Galería de fotos Issue tracker Identidad gráfica Puesta en producción Poi Labs Linux+Apache+Zope

http://code.google.com/appengine

introducción a Google App Engine

Entorno de desarrollo que proporciona: Servidor web

Escalabilidad y balanceo de carga automático

Servidor de correo electrónico

Taller II Coreis Python 13112009

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