Toyplot has supported Python 2 and Python 3 with a single code base since very early in its development, and the current release (0.18.0 as of this writing) is no exception.
However, you should be aware that Python 2 will no longer be maintained past 2020 (https://pythonclock.org), and Toyplot is a member of a significant group of projects that have pledged to end support for Python 2 soon (https://python3statement.org). In particular, Toyplot will no longer support Python 2 after December 31st, 2018.
What this means¶
The Toyplot 0.18 branch will be the final release with Python 2 support. Toyplot releases after December 31st, 2018 will have portability code removed, and our automated regression testing will be Python 3 only after that date. We will consider pull requests for the 0.18 branch on a case-by-case basis.