云计算服务器虚拟化如何实现？基本原理是什么？相比于传统智能技术它有哪些优缺点？有哪些开源技术框架支持？哪些编程语言可以支持开发？基本开发流程分享（图文详解1）

import os

class VirtualMachine:
    def __init__(self, name, cpu, memory, disk):
        self.name = name
        self.cpu = cpu
        self.memory = memory
        self.disk = disk
        self.status = 'stopped'
    
    def start(self):
        if self.status == 'stopped':
            self.status = 'running'
            print(f"Virtual machine {self.name} started.")
        else:
            print(f"Virtual machine {self.name} is already running.")
    
    def stop(self):
        if self.status == 'running':
            self.status = 'stopped'
            print(f"Virtual machine {self.name} stopped.")
        else:
            print(f"Virtual machine {self.name} is already stopped.")
    
    def restart(self):
        self.stop()
        self.start()

# 创建虚拟机
vm1 = VirtualMachine('VM1', 2, 4, 100)
vm2 = VirtualMachine('VM2', 4, 8, 200)

# 启动虚拟机
vm1.start()
vm2.start()

# 停止虚拟机
vm1.stop()

# 重启虚拟机
vm2.restart()