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Puzzled by "is"

>>() is ()
True
>>(1,) is (1,)
False

Why?

Thanks,

Dick Moores

Aug 9 '07 #1
1 1015
On 2007-08-09, Dick Moores <rd*@rcblue.comwrote:
>() is ()
True
>(1,) is (1,)
False

Why?
From _Python Reference Manual_: 5.2.4 List displays:

An empty pair of parentheses yields an empty tuple object.
Since tuples are immutable, the rules for literals apply (i.e.,
two occurrences of the empty tuple may or may not yield the
same object).

--
Neil Cerutti
Aug 9 '07 #2

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