Python para la Plataforma Java
               Leo Soto M.



  Jornadas Regionales del Software Libre 2009
Avisos Comerciales...
Python para la plataforma Java
¿Plataforma Java sin Java?
http://www.flickr.com/photos/lab2112/457187539/
Plataforma Java con Java
y Python, Ruby, Scala, Groovy...
¿Por qué Python?
“Python is an experiment in how much freedom
             programmers need...”
“...Too much freedom and nobody can read
another's code; too little and expressiveness is
                 endangered”

  ...
Python
Dinámico, flexible, extremadamente legible
Jython
Dinámico, flexible, extremadamente legible

   En una plataforma ubicua, sólida
http://www.flickr.com/photos/mushon/282287572/
1997
Jython!
Jython, 12 años después




               http://www.flickr.com/photos/digital-noise/3650559857/
2.5.1
Full compatibilidad con CPython
web2py


etree             nose


 setuptools   virtualenv
OK
¿Pero qué puedo hacer con Jython
             hoy?
GUIs
Demo con Swing
De Java a Jython
final JFrame frame = new JFrame("HelloSwing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(300,300...
frame = JFrame("HelloSwing")
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
frame.setSize(300,300)
frame = JFrame("HelloSwing",
               defaultCloseOperation=JFrame.EXIT_ON_CLOSE,
               size=(300, 300))
Container content = frame.getContentPane();
content.setLayout(new FlowLayout());
content = frame.contentPane
content.setLayout(new FlowLayout());
content = frame.contentPane
content.layout = FlowLayout()
JButton botonSaludar = new JButton("Saludar");
JButton botonDespedir = new JButton("Despedirse");
botonSaludar.addActionLi...
def saludar(event):
    JOptionPane.showMessageDialog(frame, "Hola!")

def despedir(event):
    JOptionPane.showMessageDia...
Otra demo con Swing
(Si es que tenemos acceso a internet)
Créditos: Frank Wierzbicki
Web
Demo con Django
Y sólo por diversión...
### View
#!/usr/bin/env python
                                                            from django import http
"""
   ...
Créditos: Jacob Kaplan-Moss
Testing




   http://www.flickr.com/photos/emotionaltoothpaste/26034597/
DocTests
def factorial(n):
                                         It must also not be ridiculously large:
    """Return the facto...
Demo de (ab)uso de DocTest
¿Por cierto, quien más usa Jython?
EADS




http://www.flickr.com/photos/nguyendai/694158734/
Lockheed Martin




http://www.flickr.com/photos/rcsj/2504022678/
¿Y dónde puedo aprender más?
jythonbook.com
¿Preguntas?
      Contacto:

       @leosoto
http://blog.leosoto.com
¡Gracias!
      Contacto:

       @leosoto
http://blog.leosoto.com
Jython: Python para la plataforma Java (JRSL 09)
Jython: Python para la plataforma Java (JRSL 09)
Jython: Python para la plataforma Java (JRSL 09)
Jython: Python para la plataforma Java (JRSL 09)
Jython: Python para la plataforma Java (JRSL 09)
Jython: Python para la plataforma Java (JRSL 09)
Jython: Python para la plataforma Java (JRSL 09)
Jython: Python para la plataforma Java (JRSL 09)
Jython: Python para la plataforma Java (JRSL 09)
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Jython: Python para la plataforma Java (JRSL 09)

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  • Jython: Python para la plataforma Java (JRSL 09)

    1. 1. Python para la Plataforma Java Leo Soto M. Jornadas Regionales del Software Libre 2009
    2. 2. Avisos Comerciales...
    3. 3. Python para la plataforma Java
    4. 4. ¿Plataforma Java sin Java?
    5. 5. http://www.flickr.com/photos/lab2112/457187539/
    6. 6. Plataforma Java con Java y Python, Ruby, Scala, Groovy...
    7. 7. ¿Por qué Python?
    8. 8. “Python is an experiment in how much freedom programmers need...”
    9. 9. “...Too much freedom and nobody can read another's code; too little and expressiveness is endangered” - Guido van Rossum, 1996
    10. 10. Python Dinámico, flexible, extremadamente legible
    11. 11. Jython Dinámico, flexible, extremadamente legible En una plataforma ubicua, sólida
    12. 12. http://www.flickr.com/photos/mushon/282287572/
    13. 13. 1997
    14. 14. Jython!
    15. 15. Jython, 12 años después http://www.flickr.com/photos/digital-noise/3650559857/
    16. 16. 2.5.1
    17. 17. Full compatibilidad con CPython
    18. 18. web2py etree nose setuptools virtualenv
    19. 19. OK
    20. 20. ¿Pero qué puedo hacer con Jython hoy?
    21. 21. GUIs
    22. 22. Demo con Swing
    23. 23. De Java a Jython
    24. 24. final JFrame frame = new JFrame("HelloSwing"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(300,300);
    25. 25. frame = JFrame("HelloSwing") frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE) frame.setSize(300,300)
    26. 26. frame = JFrame("HelloSwing", defaultCloseOperation=JFrame.EXIT_ON_CLOSE, size=(300, 300))
    27. 27. Container content = frame.getContentPane(); content.setLayout(new FlowLayout());
    28. 28. content = frame.contentPane content.setLayout(new FlowLayout());
    29. 29. content = frame.contentPane content.layout = FlowLayout()
    30. 30. JButton botonSaludar = new JButton("Saludar"); JButton botonDespedir = new JButton("Despedirse"); botonSaludar.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { JOptionPane.showMessageDialog(frame, "Hola!"); } }); botonDespedir.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { JOptionPane.showMessageDialog(frame, "Chao!"); frame.dispose(); } }); content.add(botonSaludar); content.add(botonDespedir);
    31. 31. def saludar(event): JOptionPane.showMessageDialog(frame, "Hola!") def despedir(event): JOptionPane.showMessageDialog(frame, "Chao!") frame.dispose() content.add(JButton("Saludar", actionPerformed=saludar)) content.add(JButton("Despedirse", actionPerformed=despedir))
    32. 32. Otra demo con Swing (Si es que tenemos acceso a internet)
    33. 33. Créditos: Frank Wierzbicki
    34. 34. Web
    35. 35. Demo con Django
    36. 36. Y sólo por diversión...
    37. 37. ### View #!/usr/bin/env python from django import http """ from django.template import Template, Context WSW - the World's Shittiest Wiki. """ def wsw(request, title): import re title = urllib.unquote_plus(title) if title else "Home" import urllib p, created = Page.objects.get_or_create(title=title) from django.conf import settings form = PageForm(instance=p) if request.method == "POST": ### Config form = PageForm(request.POST, instance=p) settings.configure( form.save() DEBUG = True, return http.HttpResponseRedirect(request.get_full_path()) DATABASE_ENGINE = "doj.backends.zxjdbc.postgresql", else: DATABASE_NAME = "wsw", form = PageForm(instance=p) DATABASE_USER = "wsw", t = Template("""<h1>{{ p.title }}</h1><ul>{% for p in DATABASE_PASSWORD = "wsw", allpages %}<li><a href="{{ p }}">{{ p }}</a></li>{% endfor %} ROOT_URLCONF = __name__) </ul><form action="{{ request.get_full_path }}" method="POST"> <p>{{ form.content }}</p><input type="submit"></form>""") ### Model wikiwords = re.findall( from django.db import models '[A-Z][a-z]+[A-Z][a-z]+(?:[A-Z][a-z]+)*', p.content) allpages = [ class Page(models.Model): page.title for page in Page.objects.order_by('title')] title = models.CharField(max_length=300, allpages.extend( primary_key=True) word for word in wikiwords if word not in allpages) content = models.TextField() return http.HttpResponse(t.render(Context(locals()))) class Meta: ### Main app_label = "wsw" if __name__ == '__main__': from django.core import management ### URLs from django.db import connection from django.conf.urls.defaults import * from django.core.management.color import no_style cursor = connection.cursor() urlpatterns = patterns(__name__, ('(.*)', 'wsw')) statements, _ = connection.creation.sql_create_model( Page, no_style()) ### Form try: from django.forms import ModelForm for sql in statements: cursor.execute(sql) class PageForm(ModelForm): connection.connection.commit() class Meta: except: model = Page pass fields = ['content'] management.call_command('runserver')
    38. 38. Créditos: Jacob Kaplan-Moss
    39. 39. Testing http://www.flickr.com/photos/emotionaltoothpaste/26034597/
    40. 40. DocTests
    41. 41. def factorial(n): It must also not be ridiculously large: """Return the factorial of n, an >>> factorial(1e100) exact integer >= 0. Traceback (most recent call last): ... If the result is small enough to OverflowError: n too large fit in an int, return an int. """ Else return a long. import math >>> [factorial(n) if not n >= 0: ... for n in range(6)] raise ValueError("n must be >= 0") [1, 1, 2, 6, 24, 120] if math.floor(n) != n: >>> [factorial(long(n)) raise ValueError( ... for n in range(6)] "n must be exact integer") [1, 1, 2, 6, 24, 120] if n+1 == n: # catch a value like 1e300 >>> factorial(30) raise OverflowError("n too large") 265252859812191058636308480000000L result = 1 >>> factorial(30L) factor = 2 265252859812191058636308480000000L while factor <= n: >>> factorial(-1) result *= factor Traceback (most recent call last): factor += 1 ... return result ValueError: n must be >= 0 Factorials of floats are OK, but the float must be an exact integer: >>> factorial(30.1) Traceback (most recent call last): ... ValueError: n must be exact integer >>> factorial(30.0) 265252859812191058636308480000000L
    42. 42. Demo de (ab)uso de DocTest
    43. 43. ¿Por cierto, quien más usa Jython?
    44. 44. EADS http://www.flickr.com/photos/nguyendai/694158734/
    45. 45. Lockheed Martin http://www.flickr.com/photos/rcsj/2504022678/
    46. 46. ¿Y dónde puedo aprender más?
    47. 47. jythonbook.com
    48. 48. ¿Preguntas? Contacto: @leosoto http://blog.leosoto.com
    49. 49. ¡Gracias! Contacto: @leosoto http://blog.leosoto.com
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