A commercial PyQt license covers all of Riverbank's commercial products. We do not sell these products individually.
A license is required to cover each of your developers using any of Riverbank's commercial products at any one time. We do not register the names of individual developers.
A license is perpetual so you may continue to use the versions covered by the license for ever. You are not licensed to use older versions that were not current at the time of purchase.
You will receive updates to new versions for one year after the date of purchase. Each year you may renew your license to continue to receive updates to new versions. The renewal cost is approximately 60% of the original purchase price.
PyQt does not include Qt itself. You must also obtain an appropriately licensed copy (either the commercial version from The Qt Company or the LGPL version from the Qt Project).
Purchase terms and conditions can be found here.