python代码：

下载链接: virtualCom.py

#coding = utf-8
 
import pty
import os
import select
 
def mkpty():
    master1, slave = pty.openpty()
    slaveName1 = os.ttyname(slave)
    master2, slave = pty.openpty()
    slaveName2 = os.ttyname(slave)
    print '\nslave device names: ', slaveName1, slaveName2
    return master1, master2
 
if __name__ == "__main__":
    master1, master2 = mkpty()
    while True:
        rl, wl, el = select.select([master1, master2], [], [], 1)
        for master in rl:
            data = os.read(master, 128)
            print "read %d data." %len(data)
            if master == master1:
                os.write(master2, data)
            else:
                os.write(master1, data)

使用方式：

创建了12 和 13端口，我们用qt测试一下：

点击发送按钮，双方都可以收到数据：