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Version 2.1.1.post1080+g0db0992
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matplotlib.axis.YAxis.set_view_interval

YAxis.set_view_interval(vmin, vmax, ignore=False)

If ignore is False, the order of vmin, vmax does not matter; the original axis orientation will be preserved. In addition, the view limits can be expanded, but will not be reduced. This method is for mpl internal use; for normal use, see set_ylim().