Re: [Jython-users] import module question

[Kevin B. <kb...@ca...>]

Mark Ackerman wrote:
> 
> We're downloading jython modules from a server as the user requests them.
> Since the modules can live in different directories on the server
> we would like to keep the same directory structure on the client.
> 
> So the plotTest.py file get downloaded to the pythonCache/a/b/scripts
> directory off of the current directory.
> 
> I've tried the following code snippet to import the module but I can't
> quite get it to work:
> 
> try:
> sys.path.index("pythonCache/a/b/scripts")
> except:
> sys.path.append("pythonCache/a/b/scripts")
> import pythonCache.a.b.plotTest
> pythonCache.a.b.plotTest.printHello()

sys.path shows where to look for Python packages (like the java classpath shows where to look for Java packages). Thus, jython
looks in the scripts directory for a pythonCache package containing an 'a' package containing a 'b' package containing a 'plotTest' package, and doesn't find it.

Thus, I think you meant:

cachedir = "pythonCache/a/b/scripts" 
if cachedir not in sys.path:
  sys.path.append( cachedir )
import plotTest
plotTest.printHello()

Note, however, that the requirements to be a Python package are different from
the requirements to be a Java package:

	a Python package is a .py file or a directory containing an __init__.py file
	a Java package is any directory containing a Java class or containing a Java package

kb