It evolved out of pyxterm, which was part of GraphTerm (as lineterm.py), v0.57.0 (2014-07-18), and ultimately derived from the public-domain Ajaxterm code, v0.11 (2008-11-13) (also on Github as part of QWeb).
Equivalent System Packages¶
$ conda install terminado python:terminado
macports: install the following packages: terminado python:terminado See https://repology.org/project/terminado/versions, https://repology.org/project/python:terminado/versions
However, these system packages will not be used for building Sage because using Python site-packages is not supported by the Sage distribution; see https://trac.sagemath.org/ticket/29023