This incarnation of VPython will not be developed further; see this announcement for an explanation and this history of the development of VPython. Development efforts are now focused on VPython 7, which runs with installed Python, including in a Jupyter notebook, and an in-browser version that requires no local installation at all and runs on mobile devices, at glowscript.org.

The home of vpython on the web is still at vpython.org.

VPython 6, at vpython.org, is based on the cross-platform library wxPython. It improves VPython 5.74 and earlier by eliminating most platform-dependent code and by eliminating the threading associated with rendering.

The new version makes essential changes to the rate statement in VPython programs:

• rate is now required; an animation loop MUST contain it.
• rate still limits the number of loop iterations per second.
• rate now updates the 3D scene when appropriate, about 30 times per second.
• rate now handles mouse and keyboard events.
• If the animation loop is missing the rate statement, the scene will not be updated until and unless the animation loop is completed.

The heart of the user-interface code, creating windows and handling events, is the file site-packages/visual_common/create_display.py. It is imported by visual/init.py and by /vis/init.py; visual imports math and numpy for convenience whereas vis doesn't.

Please report issues to the Github repository, or to the VPython forum.