pypy

Python 是个比较成熟的语言，运行速度在几年前是快于 JavaScript 的。但这些年 JavaScript 的解释器发展很快，特别是 Google 的 V8 和 Mozilla 的 SpiderMonkey， 将 JavaScript 的运行速度提升了一大块，以致 JavaScript 的运行速度大有反超 Python 之势，但 Python 也不甘示弱，PyPy 项目经过几年的开发之后，最近也在频频发布版本， 将 JIT 带到 Python 之中，所以谁比谁牛，还很难说。这里做个简单的测试： 测试环境： CPU： Intel(R) Pentium(R) CPU G620 @ 2.60GHz 双核 操作系统： Debian GNU/Linux 6.0 64 位 Google JS 引擎： 来自 Node.js v0.6.12 (命令：node) Mozilla JS 引擎：来自 xulrunner-11.0 (命令：xpcshell) Python： Debian 自带的 Python 2.6.6 (命令：python) PyPy： pypy-1.8 (命令：pypy) 先测试简单的循环累加，测试代码： testSum.js var i, j, s; for (i = 0; i < 100; i++) { s = 0; for (j = 0; j < 100000; j++

How do I install Python egg under PyPy? During installation, PyPy created /usr/lib64/pypy-1.5/site-packages/ directory. So, I tried using easy_install with prefix set to this directory, however it complains that this is not a valid directory for eggs. Do I just copy eggs from /usr/lib/python2.7/site-packages , or is it as easy as using easy_install (with some changes in configuration, perhaps)? My working environment is Fedora 15 Beta, Python 2.7.1 ( /usr/bin/python ), PyPy 1.5.0-alpha0 with GCC 4.6.0 (in /usr/bin/pypy , installed from RPM using yum), easy_install version is: distribute 0.6.14

I want to speed up my program so i'm trying to setup pypy + psycopg2cffi. This program opens a xml, parses it and then insert some data in a database. I'm using currently python3, postgresql and psycopg2 but this approaches is really slow. So i want to try run my program with pypy + psycopg2cffi. I have python 3 and pypy, and i want to install psycopg2cffi so i ran this command: pip install psycopg2cffi psycopg2cffi-compat But psycopg2cffi was only installed on python because when i try to import psycopg2cffi on pypy this is the error i get: ImportError: No module named psycopg2cffi So i think

It is standard convention to use if foo is None rather than if foo == None to test if a value is specifically None . If you want to determine whether a value is exactly True (not just a true-like value), is there any reason to use if foo == True rather than if foo is True ? Does this vary between implementations such as CPython (2.x and 3.x), Jython, PyPy, etc.? Example: say True is used as a singleton value that you want to differentiate from the value 'bar' , or any other true-like value: if foo is True: # vs foo == True ... elif foo == 'bar': ... Is there a case where using if foo is True

I have ubuntu 11.10. I apt-get installed pypy from this launchpad repository: https://launchpad.net/~pypy the computer already has python on it, and python has its own pip. How can I install pip for pypy and how can I use it differently from that of python? xubuntix Quoting (with minor changes) from here the pypy website : If you want to install 3rd party libraries, the most convenient way is to install pip: $ curl -O https://bootstrap.pypa.io/get-pip.py $ ./pypy-2.1/bin/pypy get-pip.py $ ./pypy-2.1/bin/pip install pygments # for example In order to use it nicely, you might want to add an

We're using Twisted extensively for apps requiring a great deal of asynchronous io. There are some cases where stuff is cpu bound instead and for that we spawn a pool of processes to do the work and have a system for managing these across multiple servers as well - all done in Twisted. Works great. The problem is that it's hard to bring new team members up to speed. Writing asynchronous code in Twisted requires a near vertical learning curve. It's as if humans just don't think that way naturally. We're considering a mixed approach perhaps. Maybe keep the xmlrpc server part and process

I'm making an algorithm that reads input from keyboard, stores it on a variable called message and then write this variable into a file. However, whenever the user is typing, if he hits the ESC key, I'd like the execution to stop without any errors. Let's say the code is: message = raw_input() What do I have to add? So if I'm in the middle of a sentence like: My name is th And I hit ESC, it stops? There is no way to do this with normal input. raw_input reads a whole line at a time. In some (very few) cases, you can do this: message = '' while True: ch = sys.stdin.read(1) if ch == '\x1b': exit