Dan Bishop wrote: >> Is there any place in the language that still requires tuples instead >> of sequences, except for use as dictionary keys? > > The % operator for strings. And in argument lists. > > def __setitem__(self, (row, column), value): > ... > Don't forget the exception specification in a try..catch statement:
> An object is compatible with an exception if it is either the object > that identifies the exception, or (for exceptions that are classes) it > is a base class of the exception, or it is a tuple containing an item > that is compatible with the exception. Requiring a tuple here means that the code doesn't have to worry about a possible recursive data structure. -- http://mail.python.org/mailman/listinfo/python-list
