> > > > (a ratio of ratios, would show this way it next books in my era >
[sic] textbooks e.g. dog : wolf :: cat : tiger (opinions may vary) Final remark: examples of my 'rear view mirror' Jupyter Notebooks used during recent meet-up (#10 of a 10x 4-hour on-line Python course): https://github.com/4dsolutions/Python5/blob/master/PySummary1.ipynb https://github.com/4dsolutions/Python5/blob/master/PySummary2.ipynb https://github.com/4dsolutions/Python5/blob/master/PySummary3.ipynb These try to pack in a lot of what we covered. In retrospect, I gave the keyword 'nonlocal' short shrift and need to address this more completely in future editions. Kirby
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