REL: v3.0.0 The first release of the Matplotlib 3.0 series This is the first version of Matplotlib to only support Python 3. Highlights of this release include: - GUI backend is selected at run-time based on what toolkits are installed. A GUI toolkit will not be selected on a headless server. - New cyclic color map *twilight* - Improvements to automatic layout of titles, ticks, and GridSpec - Many bug fixes!