Error when starting with ipython

[rudaoshi]

when run the Nubia with ipython=True, I got the error log:

File ".../nubia/internal/ipython.py", line 39, in start_interactive_python
if ctx.target:
AttributeError: 'Context' object has no attribute 'target'

[motohedgehog]

I can confirm this. We need to strip anything intrinsic to LDShell from IPython mode.