Python 3000

Python 2.6 was released not too long ago as an update adding great stuff like simplejson within python.  But Python 3000 might be the release that draws lots of usage and programmers new and veteran.

Here is a list of the Tenjin Templating engines:

• pyTenjin
• phpTenjin
• rbTenjin
• jsTenjin
• plTenjin

Changes

(Python) (Ruby) (PHP) (Perl) (JavaScript)

User’s Guide

(Python) (Ruby) (PHP) (Perl) (JavaScript)

FAQ

(Python) (Ruby) (PHP) (Perl) (JavaScript)

Examples

(Python) (Ruby) (PHP) (Perl) (JavaScript)

Presentation

2007 LL Spirit LightningTalk (full-version) (Japanese)

Here is what the template markup looks like:

This

<table>
<tbody>
<?py i = 0 ?>
<?py for item in ['<foo>', 'bar&bar', '"baz"']: ?>
<?py     i += 1 ?>
<tr>
<td>#{item}</td>
<td>${item}</td>
</tr>
<?py #end ?>
<tbody>

</table>

Produces This

<table>
<tbody>
<tr>
<td><foo></td>
<td>&lt;foo&gt;</td>
</tr>
<tr>
<td>bar&bar</td>
<td>bar&amp;bar</td>
</tr>
<tr>
<td>"baz"</td>
<td>&quot;baz&quot;</td>
</tr>
<tbody>
</table>

Here are some speed results

PureMVC is a lightweight framework  for creating applications based
upon the classic Model-View-Controller design meta-pattern.
This free, open-source framework is implemented in ActionScript 2 and
3, Java, C# and a number of other popular programming languages.
This allows development on a wide variety of platforms including:

• Mobile Environments: FlashLite, .NET Compact Framework, J2ME
• Server Environments: ColdFusion, J2EE, PHP, Python
• Browser Environments: Flash/Flex, JavaFX, Silverlight
• Desktop Environments: .NET, AIR, FLASH, J2SE

For Flex PureMVC happens to be my favorite MVC kit.  I only use one if absolutely necessary but PureMVC keeps it clean.  The great thing is that is works with or without Flex unlike Cairngorm and it is always up to date.  It is just an added bonus that is spans so many other platforms. There are a few things I don’t like about it in other platforms like the url naming but it is much better than kits out there now and Microsoft’s ASP.NET MVC most likely wont’ be cross platform *wink*.

Some info on the PureMVC framework (caution PDF):

• Goals & Benefits
• Conceptual Diagram
• Framework Overview
• Best Practices

PureMVC Manifold

• Documentation
• Project Owners
• Repositories
• Get Involved!

Ports

• ActionScript 2
• ActionScript 3
• C#
• ColdFusion
• Java
• Perl
• PHP
• Python
• Ruby
• Propose a Port

So now we have Google (They employ Guido), Microsoft (IronPython) and Sun (Jython) all turning into Python-istas. Does this mean Python is destined for greatness in the near future? Well I recommend learning it. It is a great language and it has a high productivity rate. Time will tell if it has the ability to be in extremely large code bases. I think it is just a matter of the architecture and organization as with any project.

Jonathan Schwartz at Sun mentioned also taking the “J” out of “JVM” to just make a VM much like a .NET framework. So Microsoft copied Java with C# the JVM and added multiple languages. Then Sun comes back and added multiple byte code compiled languages. And then they both focus on dynamic engines to implement versions of Python, Microsoft doing this within their DLR.

Many times the larger market languages that end up running business or “enterprisey” are heavily influenced by companies, in addition to the other demands from consumers, which here is programmers. So when the big three are all banking on Python as a draw there is a definite market draw there and a tell on the future. But I think it is apparent that Python is becoming a standard market baseplane language.

It is great to be able to use other libraries from .net with IronPython and java libraries with Jython. It has found a way to integrate with the current infrastructure and the language has low bar entry but deep benefits. Python is snaking its way into the market.

Python is so non verbose…

import sys
import clr
from System.IO import Path, Directory, FileInfodir = Path.Combine(sys.prefix, 'DLLs')

if Directory.Exists(dir):
    sys.path.append(dir)
    files = Directory.GetFiles(dir)
    for file in files:
        if file.lower().endswith('.dll'):
            try:
                clr.AddReference(FileInfo(file).Name)
            except:
                pass

This sample is from IronPython showing adding dynamic references to all dlls loaded.

Check out this HTML/XHTML parser in pure Python.

from HTMLParser import HTMLParserclass MyHTMLParser(HTMLParser):
def handle_starttag(self, tag, attrs):
print "Encountered the beginning of a %s tag" % tag
def handle_endtag(self, tag):
print "Encountered the end of a %s tag" % tag