“New GPAW”
The GPAW backend is currently undergoing significant refactoring. Occasionally we distinguish between “new” and “old” GPAW in the documentation.
Note
New GPAW is now the default!
See also
For some operations, you will need to use old GPAW. See the release notes for which things this is. To explicitly use the old backend, use:
calc = GPAW(..., legacy_gpaw=True)