[PonyORM-list] global name 'desc' is not defined

[Guy Jacks]

transactions = Transaction.select().order_by(desc(Transaction.created))[:]

This works without the desc() method but it fails after I wrap
Transaction.created in desc().

The documentation states that the following should work:

for p in Product.select(lambda p: p.price >
100).order_by(desc(Product.price))

Thanks in advance for any pointers.
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