I've spent probably about a day figuring out what's going on here, Google being no help whatsoever, so figure I might as well publish.
Scenario -- Jython 2.2b1, installed in standalone mode i.e. all of /Lib inside the jar, and cachedir being skipped.
Now this sort of code works with Jython launched from the jar in the standard install:
but with Jython.jar from the standalone the code gives
C:\jython2.2b1-standalone>java -jar jython.jar Jython 2.2b1 on java1.6.0 (JIT: null) Type "copyright", "credits" or "license" for more information. >>> import java.awt Traceback (innermost last): File "
", line 1, in ? ImportError: no module named awt >>> ^Z
Hunting down the error message, it is raised in
org.python.core.imp, ultimately from
JavaImportHelper.tryAddPackage() failing. Meanwhile, from the other direction, doing
import sys dir(sys)
gave me that
sys has a
packageManager attribute. And that has a
makeJavaPackage method. This lives in
So, that seemed worth giving a try. Like
And that, at last, worked.
Now, you might think it would be elegant to do something like
to allow for the cases where it would work anyway; but this doesn't work -- the branch is taken, but the conditional packaging doesn't seem to stick. However, it doesn't seem to matter if you always explicitly add the package as part of the initialisation, even when not strictly needed. So stick with the simple case. It's more Pythonic that way, after all.