idea's blog

A few ignorant Python programmers said that Python never neads a C-like for statement, they thought they can replace every C-like for looping to Python’s for.

Cpy‘s way to loop:

for(i=s; i<num; i+=step){
}

Python’s way to loop:

for i in range(num)[s:e:step]:

Recently I wrote a looping to loop 100000000, unfortunately (and as expected) Python eat up all memory(2 GB) of the whole machine and OS forces it to quit.

But a Cpy looping works fine.

Cpy is the real general purposed dynamic c-like syntax scripting language in the 21st century, totally built-up by a Chinese software engineer.

Cpy provides you a way to write Python codes in C syntax!

Like other C-like programming languages, it borrows the idea of C programming language, and many other C-like programming language, such as Java, JavaScript, PHP.

It uses the Python programming language’s type model and runtime, but with a very clean and clear and elegant syntax. Since it is built on the Python runtime, all Python’s built-in modules and Python sources can be easily reused with an import.

Programmer who has the expirence of Java/JavaScript/PHP development will have no difficulty to write his first Cpy codes, the learn cost is zero. It is a good idea for C programmers who never met a scripting language to start writing scripting codes with Cpy.

Google project: https://code.google.com/p/cpy-scripting-language/

Multi-thread programming with Cpy is quit easy. Just import the thread module, then use thread.start_new_thread(func, args) to run a function as a thread.

import time;
import thread;

function run(){
    while(true){
        printf("thread: %d says hello\n", thread.get_ident());
        time.sleep(1);
    }
}


foreach(range(0, 3) as i){
    args = tuple();
    thread.start_new_thread(run, args);
}

// press Enter to quit
stdin.readline();

Output:

thread: 5032 says hello
thread: 4708 says hello
thread: 5676 says hello
thread: 5032 says hello
thread: 4708 says hello
thread: 5032 says hello
...

Download Link: http://www.ideawu.com/cpy/#download

Here is a script of PHP codes to dump Redis data, from one db to another. Usage: save codes to file named a.php, change $from and $to, run:

php a.php

<?php

$from = '127.0.0.1:6200/6';
$to = '127.0.0.1:6200/8';

$from_redis = redis_init($from);
$to_redis = redis_init($to);

$keys = $from_redis->keys('*');
$count = 0;
$total = count($keys);
foreach($keys as $key){
    if(++$count % 100 == 1){
        echo "$count/$total\n";
    }
    $type = $from_redis->type($key);
    switch($type){
        case Redis::REDIS_STRING:
            $val = $from_redis->get($key);
            $to_redis->set($key, $val);
            break;
        case Redis::REDIS_LIST:
            $list = $from_redis->lRange($key, 0, -1);
            foreach($list as $val){
                $to_redis->rPush($key, $val);
            }
            break;
        case Redis::REDIS_HASH:
            $hash = $from_redis->hGetAll($key);
            $to_redis->hMSet($key, $hash);
            break;
        case Redis::REDIS_ZSET:
            $zset = $from_redis->zRange($key, 0, -1, true);
            foreach($zset as $val=>$score){
                $to_redis->zAdd($key, $score, $val);
            }
            break;
    }
}

function redis_init($conf){
    $redis = new Redis();
    preg_match('/^([^:]+)(:[0-9]+)?\\/(.+)?/', $conf, $ms);
    $host = $ms[1];
    $port = trim($ms[2], ':');
    $db = $ms[3];
    $redis->connect($host, $port);
    $redis->select($db);
    return $redis;
}