Laxmikant Chitare wrote:
> Hello All,
>
> I read about this article:
>
http://www.python.org/workshops/1998-11/proceedings/papers/montanaro/montanaro.html
>
> Just wanted to clarify whether CPython already includes these kind of byte
> code optimizations? Are all the temporary variables removed when byte code
> is generated?
You can find out for yourself:
Python 3.4.0rc1+ (default:2ba583191550+, Feb 12 2014, 00:08:44)
[GCC 4.6.1] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import dis
>>> def f():
... a, b, c = 1, 2, 3
...
>>> dis.dis(f)
2 0 LOAD_CONST 4 ((1, 2, 3))
3 UNPACK_SEQUENCE 3
6 STORE_FAST 0 (a)
9 STORE_FAST 1 (b)
12 STORE_FAST 2 (c)
15 LOAD_CONST 0 (None)
18 RETURN_VALUE
>>> def g():
... q = 2 + 3j
...
>>> dis.dis(g)
2 0 LOAD_CONST 3 ((2+3j))
3 STORE_FAST 0 (q)
6 LOAD_CONST 0 (None)
9 RETURN_VALUE
If you can read C there is also
http://hg.python.org/cpython/file/180e4b678003/Python/peephole.c
--
https://mail.python.org/mailman/listinfo/python-list
