python大家用的版本是什么，why?

基本上是 2.6.x,因为 ubuntu 系统预装了,而且比较主流
有台windows服务器因为依赖的模块只有 2.5.x 的,只好装 2.5 的了

2.7, 开始往3靠

激进的arch。。不过好在有virtualenv
[cynic@9hills:~]
% python --version
Python 3.2.2
[cynic@9hills:~]
% python2 --version
Python 2.7.2

可以试试pypy.org
mailing list原文

Summary: Pypy 1.7 is almost twice as fast as cpython 2.7 on the
tornado HTTPServer benchmark, and three times as fast on the
template-rendering benchmark. Pypy used about three times as much
memory in both cases, but usage was stable over time (i.e. it's not
"leaking" like pypy 1.6 did).

Details: Tested on an "m1.large" EC2 instance running ubuntu 10.04
and the 64-bit binary releases of pypy (and cpython 2.7 from
https://launchpad.net/~fkrull/+archive/deadsnakes). Large instances
have two cores so the ab client wasn't competing for cpu cycles with
the python process.

ubuntu@ip-10-114-147-85:~/tornado$ /usr/bin/time python2.6
demos/benchmark/benchmark.py --quiet --num_runs=5|grep "Requests per
second"
Requests per second: 2010.39 [#/sec] (mean)
Requests per second: 2010.70 [#/sec] (mean)
Requests per second: 2000.56 [#/sec] (mean)
Requests per second: 2007.37 [#/sec] (mean)
Requests per second: 1983.27 [#/sec] (mean)
34.19user 7.29system 0:37.75elapsed 109%CPU (0avgtext+0avgdata
59040maxresident)k
0inputs+0outputs (0major+22404minor)pagefaults 0swaps

ubuntu@ip-10-114-147-85:~/tornado$ /usr/bin/time python2.7
demos/benchmark/benchmark.py --quiet --num_runs=5|grep "Requests per
second"
Requests per second: 2127.01 [#/sec] (mean)
Requests per second: 2122.64 [#/sec] (mean)
Requests per second: 2219.56 [#/sec] (mean)
Requests per second: 2209.65 [#/sec] (mean)
Requests per second: 2204.07 [#/sec] (mean)
30.62user 6.76system 0:34.83elapsed 107%CPU (0avgtext+0avgdata
60480maxresident)k
0inputs+8outputs (1major+20898minor)pagefaults 0swaps

ubuntu@ip-10-114-147-85:~/tornado$ /usr/bin/time ~/pypy-1.6/bin/pypy
demos/benchmark/benchmark.py --quiet --num_runs=5|grep "Requests per
second"
Requests per second: 2436.49 [#/sec] (mean)
Requests per second: 3289.71 [#/sec] (mean)
Requests per second: 3469.36 [#/sec] (mean)
Requests per second: 3453.05 [#/sec] (mean)
Requests per second: 3373.15 [#/sec] (mean)
22.06user 6.76system 0:25.76elapsed 111%CPU (0avgtext+0avgdata
328208maxresident)k
0inputs+3328outputs (0major+89216minor)pagefaults 0swaps

ubuntu@ip-10-114-147-85:~/tornado$ /usr/bin/time ~/pypy-1.7/bin/pypy
demos/benchmark/benchmark.py --quiet --num_runs=5|grep "Requests per
second"
Requests per second: 2673.48 [#/sec] (mean)
Requests per second: 4410.94 [#/sec] (mean)
Requests per second: 4155.42 [#/sec] (mean)
Requests per second: 4164.85 [#/sec] (mean)
Requests per second: 4626.81 [#/sec] (mean)
17.15user 6.95system 0:21.08elapsed 114%CPU (0avgtext+0avgdata
186576maxresident)k
0inputs+2680outputs (0major+59250minor)pagefaults 0swaps

ubuntu@ip-10-114-147-85:~/tornado$ /usr/bin/time python2.7
demos/benchmark/template_benchmark.py --num=1000
38.003 ms per iteration
37.56user 0.54system 0:38.14elapsed 99%CPU (0avgtext+0avgdata 46672maxresident)k
0inputs+136outputs (0major+119479minor)pagefaults 0swaps

ubuntu@ip-10-114-147-85:~/tornado$ /usr/bin/time ~/pypy-1.7/bin/pypy
demos/benchmark/template_benchmark.py --num=1000
12.899 ms per iteration
13.08user 0.03system 0:13.11elapsed 99%CPU (0avgtext+0avgdata
153296maxresident)k
0inputs+144outputs (0major+14267minor)pagefaults 0swaps

gentoo 2.7&3，macosx 2.5

archlinux py2.7

@9hills 这个连python的版本也能管理？我一直以为只能管理包的版本

py 2.6.6...

@mlzboy virtualenv -p /usr/bin/python2.6
-p 是 --python 故也可以用 --python=python2.5 这种格式

p.s. virtualenv + pip 乃是王道～～ 远程部署再加上 Fabric 就完美了

2.7

2.7

2.7

2.7 on lion

2.7 on ubuntu & win7
是否最新并不是最重要的，stable第一。

从2.5出来用到现在没换过
不需要换

WIN 下，2.7 & 2.6 貌似RHEL上自带的是2.4

2.7 马上转到3

2.7

2.7