[Python-Dev] A Hygienic Macro System in Python?

[Patrick K. O'Brien]

The pure Python version doesn't seem too bad.

def transact(call):
    if not callable(call): raise TypeError
    doc.BeginTransaction()
    try:
         try:
             call()
         except:
             # an error occurred part way through. make sure everything
             # is reverted (sort of a rollback)
             doc.AbortTransaction()
    finally:
         doc.EndTransaction()

def something():
    pass

transact(something)

---
Patrick K. O'Brien
Orbtech