On Thu, Feb 11, 2010 at 10:21, Matthew Russell
<matt.horizon5@gmail.com> wrote:
this seems to work in python 2.x and python3.1, although I suspect it's a bug.
>>> t = (1, 2)
>>> t += (3,)
>>> t
(1, 2, 3)
The object "t" references at the end isn't the same one that it references at the beginning. Note the difference between lists and tuples here:
>>> a = [1,2]
>>> id(a)
11274840
>>> a += [3,]
>>> id(a)
11274840
a is a list; augmented assignment mutates it, but it's still the same object.
>>> b = (1,2)
>>> id(b)
13902872
>>> b += (3,)
>>> id(b)
13915800
>>>
b is a tuple; augmented assignment creates a new object and re-binds "b" to it.