Litvin wrote:
At 11:16 PM 7/13/2010, Vern Ceder wrote:
Actually this behavior has been in Python since augmented assignments
were introduced in version 2.0. The official wording on this (buried in
the language reference) is (2.7 version, emphasis mine):
Vern,
I was comparing Python 3 with 2.5; the latter doesn't seem to do += for
lists in place.
Gary Litvin
According to the documentation it does. The documentation has pretty
much the same wording (see
http://docs.python.org/release/2.5/ref/augassign.html). I just tried it
with 2.5.2 and I got:
Python 2.5.2 (r252:60911, Oct 5 2008, 19:24:49)
[GCC 4.3.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> a = [1,2]
>>> b = [3,4]
>>> c = a
>>> a += b
>>> c
[1, 2, 3, 4]
>>>
So yeah, Python does += in place for all versions starting with 2.0.
Cheers,
Vern
--
This time for sure!
-Bullwinkle J. Moose
-----------------------------
Vern Ceder, Director of Technology
Canterbury School, 3210 Smith Road, Ft Wayne, IN 46804
vce...@canterburyschool.org; 260-436-0746; FAX: 260-436-5137
The Quick Python Book, 2nd Ed - http://bit.ly/bRsWDW
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