"ast" <nom...@invalid.com> a écrit dans le message de
news:55dc853c$0$3083$426a7...@news.free.fr...
"Joel Goldstick" <joel.goldst...@gmail.com> a écrit dans le message de
news:mailman.23.1440513059.11709.python-l...@python.org...
On Tue, Aug 25, 2015 at 10:16 AM, ast <nom...@invalid.com> wrote:
[a,b,c,d] = 1,2,3,4
a
1
b
2
c
3
d
4
I have never seen this syntax before. Is it documented.
Is there a name for that ?
thx
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its called list unpacking or packing (?)
the right side is considered a tuple because of the commas
a = 1,2,3
a
(1, 2, 3)
a[1]
2
http://www.developer.com/lang/other/article.php/630101/Learn-to-Program-using-Python-Unpacking-Tuples.htm
--
Joel Goldstick
http://joelgoldstick.com
Yes you are right, it is related to tuple unpacking
Here are some useful examples I found.
http://svn.python.org/projects/python/branches/pep-0384/Lib/test/test_unpack_ex.py
Unpack in list
>>> [a, *b, c] = range(5)
>>> a == 0 and b == [1, 2, 3] and c == 4
True
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