jython-users

Re: [Jython-users] import module question

[Mark A. <mar...@ho...>]

Yes I got that to work but I want to specify the complete package
on the import line.  this is because there can be more than 1
plotTest.py module in the sys.path.

So taking your code I want to do something like:

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


to make sure I get the correct plotTest module.

Mark

From: Kevin Butler <kb...@ca...>
To: Mark Ackerman <mar...@ho...>
CC: jyt...@li...
Subject: Re: [Jython-users] import module question
Date: Tue, 05 Mar 2002 16:42:49 -0700

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




Thanks,
Mark

email : mar...@ho...


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Re: [Jython-users] import module question

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

Mark Ackerman wrote:
> 
> Yes I got that to work but I want to specify the complete package
> on the import line.  this is because there can be more than 1
> plotTest.py module in the sys.path.
> 
> So taking your code I want to do something like:
> 
> cachedir = "pythonCache/a/b/scripts"
> if cachedir not in sys.path:
>    sys.path.append( cachedir )
> import pythonCache.a.b.scripts.plotTest
> pythonCache.a.b.scripts.plotTest.printHello()
> 
> to make sure I get the correct plotTest module.

So you want to do make each of the directories in your cachedir
into a python package - that means they need to have __init__.py files:

path = "pythonCache/a/b/scripts"

# ensure there are __init__.py files in each directory
# ideally, these would be in the source of the cache...
while path:
  try:
    open( os.path.join( path, "__init__.py" ), "wa" ).close()
  catch IOException, val:
    print "unable to create __init__.py in", path, val
  path, dir = os.path.split( path )

import pythonCache.a.b.scripts.plotTest
pythonCache.a.b.scripts.plotTest.printHello()

kb

Re: [Jython-users] import module question

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

Kevin Butler wrote:
> 
> Mark Ackerman wrote:
> >
> > Yes I got that to work but I want to specify the complete package
> > on the import line.  this is because there can be more than 1
> > plotTest.py module in the sys.path.
> >
> > So taking your code I want to do something like:
...
> > to make sure I get the correct plotTest module.

Then is what you really want to do something more like this?

globals = globals()
locals = {}
execfile( "cacheDir/a/b/scripts/plotTest.py", globals, locals )

???

kb