Am 06.04.2014 09:25, schrieb Gary Herron:
On 04/05/2014 11:53 PM, John Ladasky wrote:
I find this programming pattern to be useful... but can it cause
problems?
No.
What kind of problems are you considering? It won't break Python. It's
perfectly legal code.
The tuple c is still immutable, consisting of two specific objects, and
(as always) without regard to the specifics or contents of those two
objects.
It seems a tuple's immutability is debatable, or is this another
instance of the small-integer-reuse-implementation-detail-artifact?
Python 2.6.6 (r266:84292, Dec 26 2010, 22:31:48)
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> a = ([1,2],[3,4])
>>> b = a
>>> a is b
True
>>> a == b
True
>>> c = (1,2,3)
>>> d = (1,2,3)
>>> c is d
False
>>> c == d
True
cheers
Paul
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