generator construction

[Jeremy Yallop]

* Eric van Riet Paap
| As an experiment I tried this list comprehension version:
| [yield node for node in Nodes(child)]
| 
| I understand that the list goes nowhere, but I thought it was a valid
| construction.
| Why do I get a "SyntaxError: invalid syntax" error?

For the same reason that the following would give an error:

  [return node for node in Nodes(child)]

Jeremy.