catch keyboard interrupts during Python execution

[stevengj]

Currently, keyboard interrupts are deferred during execution of Python code, since CPython is not interrupt-safe. It would be nice to catch these interrupts and set a KeyboardInterrupt Python exception so that Python code is halted gracefully.

[StephenVavasis]

Currently (Windows 8.1, Julia 0.4.5, PyCall 1.6.1, PyPlot 2.1.1) I see the opposite problem. Once my Julia program starts making PyPlot calls, then ctrl-c is no longer able to interrupt the running Julia program until it reaches the next PyPlot invocation.

[damiendr]

Agreed that this would be nice. In my case this mostly bites in combination with IJulia -- if I accidentally ask PyPlot to draw something that takes forever, the only way to interrupt it is to restart the notebook (and lose all the previous results).

[athre0z]

This is also my primary reason for annoyance in this otherwise excellent library, also while working in IJulia. If this is reasonably easy to implement, that would be greatly appreciated!

[Quantisan]

related discussion over at PythonCall JuliaPy/PythonCall.jl#219