numpy练习

```python
`#random.choice （整数或序列，size,p）,p为概率`

`import numpy as np`
`a=np.random.choice(np.arange(100),size=(3,4))`
`a`

`#一等奖-3%，二等奖-5%，三等奖—8%，谢谢参与`
`import numpy as np` 
`list=['一等奖','二等奖','三等奖','谢谢参与']`
`percent=[0.03,0.05,0.08,0.84]`
`res=np.random.choice(list,(3,10),p=percent)`
`res`
```![在这里插入图片描述](C:%5CUsers%5C86182%5CAppData%5CRoaming%5CTypora%5Ctypora-user-images%5Cimage-20220409130035907.png#pic_center)