ZptSharp currently support python: expressions, but it has no way to import modules from elsewhere. This story is to add an import: expression type, borrowing similar syntax and functionality from the Chameleon framework. The actual syntax within the import expression would use the same syntax as a Python 2.7 import statement.
The overall effect would be quite similar to that of a C# using statement, enabling the use of some imported code/functionality.
Possible competing or related functionality
There is also - in the original ZPT spec - a note about referencing modules, which seems to relate to this. This should be examined alongside the proposal above to determine whether it competes or supplements that.