The Zope Toolkit supports different versions of Python for its releases.
The ZTK 1.0.x release series supports the following versions of Python:
This means that no features beyond Python 2.4 should be used in any library that is part of this Zope Toolkit series.
The ZTK 1.1.x release series supports the following versions of Python:
Support for Python 2.4 is no longer maintained. Zope Toolkit packages are allowed to make use of Python 2.5+ features and break compatibility with Python 2.4.
Newer Python versions might be supported by the release.