Search code examples
pythonpathjython

Jython does not load PYTHONPATH into sys.path

According to what I've read, sys.path should be set by PYTHONPATH. In Python, it works that way, but not in Jython. I can circumvent with -Dpython.path=... but I'd like to know why Jython isn't playing nicely.

qa@Scantron:/tmp/pip-build-qa/robotframework> echo $PYTHONPATH
/usr/lib64/python2.7
qa@Scantron:/tmp/pip-build-qa/robotframework> jython
Jython 2.2.1 on java1.7.0_17
Type "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', '/usr/share/jython/Lib', '__classpath__']
>>> ^D
qa@Scantron:/tmp/pip-build-qa/robotframework> jython -Dpython.path=/usr/lib64/python2.7
Jython 2.2.1 on java1.7.0_17
Type "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', '/usr/share/jython/Lib', '/usr/lib64/python2.7', '__classpath__']
Solution

  • Jython does not use PYTHONPATH: you can see here a discussion.

    From 2.5 onwards there is a variable that does the same: JYTHONPATH. Before that you can use the trick you already know.

    Source: Jython and PYTHONPATH