REL: v2.2.0 LTS The first release of the v2.2 LTS series and the last version of Matplotlib to support python2. There will be bug-fix release for this series until 2020. This release includes new features including: - An experimental constrained layout manager - Color blind friendly color map (cividis) and color cycle (tableau-colorblind10) - native support for numpy.datetime64 types - animated gif writing via pillow - TkAgg now works with pypy - cairo based backends for Qt, Tk, and WX There are several API changes in this release: - To support the constrained layout Matplotlib has a new required dependency (kiwisolver). - The `matplotlib.finance` module has been removed, development has moved to a stand-alone project.