如何将源代码粘贴到vim没有错误格式？

这很难说明，让我们看看屏幕截图。
注意：蓝色和黄色线只是使用“缩进指南插件”。

这是源代码示例：

import threading
import time
class timer(threading.Thread): #The timer class is derived from the class threading.Thread
    def __init__(self,num,interval):
        threading.Thread.__init__(self)
        self.thread_num = num
        self.interval = interval
        self.thread_stop = False

    def run(self): #Overwrite run() method,put what you want the thread do here
        while not self.thread_stop:
            print 'Thread Object(%d),Time:%s/n' %(self.thread_num,time.ctime())
            time.sleep(self.interval)
    def stop(self):
        self.thread_stop = True


def test():
    thread1 = timer(1,1)
    thread2 = timer(2,2)
    thread1.start()
    thread2.start()
    time.sleep(10)
    thread1.stop()
    thread2.stop()
    return

if __name__ == '__main__':
    test()