用python消耗linux内存方法

# -*- coding: utf-8 -*-
import sys
import re
import time

def print_help():
    print "Usage: "
    print "  python mem.py 100MB"
    print "  python mem.py 1GB"

if __name__ == "__main__":
    if len(sys.argv) == 2:
        pattern = re.compile("^(d*)([M|G]B)$")
        match = pattern.match(sys.argv[1].upper())
        if match:
            num = int(match.group(1))
            unit = match.group(2)
            if unit == "MB":
                s = " " * (num * 1024 * 1024)
            else:
                s = " " * (num * 1024 * 1024 * 1024)

            time.sleep(10000)
        else:
            print_help()
    else:
        print_help()