Python cmd下使用三板斧

1，cmd 切换目录：

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d:                                    //切换到d盘
cd D:\Program Files\Microvirt         // 切换到该目录下

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2，运行py文件：

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python D:\demos\python\biods.py //不带参数
python D:\demos\python\m.py D:\demos\python\img\nv.jpg D:\demos\python\img\titles  //带参数

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3，安装缺失类库：

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1--切换到python安装盘：c:

2--切换到Python安装目录：cd C:\Users\wan\AppData\Local\Programs\Python\Python36\Scripts

3--安装类库：pip install matplotlib

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