Fix driver.py command line args when using ipython #68
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This fixes #63
The bug is caused when starting the client or kernel driver while having
python-shell-interpreter set to ipython. The driver.py command line
arguments (e.g., "--port" or "--conn-file") get parsed by ipython which
doesn't recognize them and exits with an error, without starting
driver.py
This fix appends "--" directly after the python interpreter path, e.g.,
/usr/bin/ipython -- /path/to/driver.py --port 8080
This has the effect of correctly passing the driver.py command line args
to driver.
This change has no effect if python-shell-interpreter is python -
presumably the python interpreter just ignores "--".