jython

The idea of this function is to fade the top half only of the picture (make it gradually darker). Here is what I have but it seems to be making all of the top half solid black. def fadeDownFromBlack(pic1): w=getWidth(pic1) h=getHeight(pic1) for y in range(0,h/2): for x in range(0,w): px=getPixel(pic1,x,y) setBlue(px,y*(2.0/h)) setRed(px,y*(2.0/h)) setGreen(px,y*(2.0/h)) Let's look at just one line here: setBlue(px,y*(2.0/h)) and key part here is y*(2.0/h) y changes, as you go down. Let's try some simple values for y and h. Let's say h is 100 and we will examine when y is both 0 and 50 (h/2).

I am trying to import a Java API, which is distributed as a jar file. I followed the instructions from this answer at a similar question in Stack Overflow, but it didn't work. In Jython, I did: >>> import sys >>> sys.path.append("/path/to/jar/api") >>> from com.thingmagic import * Traceback (most recent calls last): File "<stdin>", line 1, in <module> ImportError: no module named thingmagic Am I missing something or did I do something wrong? You need to provide the full path of the JAR file. Change sys.path.append("/path/to/jar/api") to sys.path.append("/path/to/jar/api/whatever_the_name_is

I looked through the other posts and bug reports and couldn't figure out what's causing this. I'm using Jython 2.5.1, in a Java project in Eclipse (Ubuntu 8.10). It has been added to the project as a standalone .jar file (I just replaced the old Jython 2.1 jar with this one). I'm running a script that uses the threading.py class. At some point the statement "import os" is evaluated from linecache.py and I get this error, which I can't seem to figure out how to fix: 'Execution failed. Traceback (most recent call last): File "<string>", line 1, in <module> File "../lib/python/threading.py", line

Quite-probably a silly question, as I don't know much about Java/Jython/JRuby/bytecode, but.. I stumbled across _why's unholy again today.. It allows you to output Python bytecode from Ruby code.. Basically allowing them to produce the same bytecode.. Jython outputs Java bytecode, as does JRuby.. Since these both compile to the same bytecode, does this mean you could potentially use any Python library from Ruby, and Ruby libraries from Python? No, that won't work. At least not the way you think it would. Interoperability between Jython and JRuby works the same way as between CPython and YARV:

I'm using Jython, Swing, and PyDev (Eclipse). Breakpoints are not being hit on any code that runs on the EDT (aka AWT Event Queue?). This includes: Functions that are invoked from a Swing event (eg JButton click) Functions that, via a decorator, are run through SwingUtilities.invokeLater() (See the last example here . Functions that registered as hooks to a Java package (socket class), that I'm using. Swing event code to reproduce: from javax.swing import JFrame, JButton def TestFunc(event): #breakpoints in this function don't work print "Hey" if __name__ == '__main__': mainWindow = JFrame(

I am trying to install a robotframework library called ImageHorizonLibrary. However, I am running into an issue. I am trying to install it using pip in the jython environment: /Users/nimam/jython2.7.0/Lib/site-packages I do the following: sudo -H pip install robotframework-imagehorizonlibrary And I get the following error: Could not install packages due to an EnvironmentError: Could not find a suitable TLS CA certificate bundle, invalid path: __pyclasspath__/pip/_vendor/certifi/cacert.pem If I try to install the library without sudo, i get the following error: Exception: Traceback (most recent

I'm currently building a Jython web app but am concerned about Jython application performance. I take some comfort in that any compute intensive tasks I can write in a separate Java jar and invoke them from Jython. Has anyone had problems doing this, or forsee issues with such a setup? You'll find a nice comparison here: http://blog.dhananjaynene.com/2008/07/performance-comparison-c-java-python-ruby-jython-jruby-groovy/ Jython is slower, but depending on what you want to do, that may not be a big problem. I use Jython primarily for allowing me to debug the application on the fly, and it works