The problem seems to be that when numpy.linspace(start, stop, num) is called in tax.get_ticks_from_axis_limits(), the num parameter is a float, but linspace wants an integer. It appears that linspace ...

This is too much. Try for a brief reference. This section of the docs is primarily about how range () works. Linspace () is at best a tangential discussion and shouldn't interfere with the usability ...