docs/introduction.ipynb crashes on cell 13 (energy_df = netlogo.repeat_report())

[EwoutH]

The introduction notebook crashed on cell 13:

ValueError: setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (6,) + inhomogeneous part.

See for a full error log cell 13 of https://github.com/EwoutH/pyNetLogo/blob/introduction-set-globals/docs/source/_docs/introduction.ipynb.

I validated the same error occurs with the unmodified notebook.

How to reproduce: Run introduction.ipynb.

[EwoutH]

@quaquel I investigated this issue a bit further. I believe it's an error of this type.

Which is quite logical, since the number of wolves and sheep varies over time, so the length of the lists [energy] of wolves, [energy] of sheep and [sheep_str] of sheep also varries.

[quaquel]

This makes sense indeed. Now we have to come up with a fix,