Jim Fulton writes: > With pop, you can essentially test whether the list is > empty and get a value if it isn't in one atomic operation: > > try: > foo=queue.pop(0) > except IndexError: > ... empty queue case > else: > ... non-empty case, do something with foo > > Unfortunately, this incurs exception overhead. I'd rather do > something like: > > foo=queue.pop(0,marker) > if foo is marker: > ... empty queue case > else: > ... non-empty case, do something with foo I'm assuming you're asking for the equivalent of: def pop(self, default=None): much like dict.get? Then how do I get the old behavior? (I've been known to do odd things - like change behavior based on the number of args - in extension modules, but this ain't an extension). - Gordon
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