给我一段numpy从float16转二进制的代码

以下是将numpy中的float16类型转换为二进制的代码：

import numpy as np

def float16_to_binary(num):
    binary = np.binary_repr(num.view('H'), width=16)
    return binary

# 示例
num = np.float16(3.14)
binary = float16_to_binary(num)
print(binary)

输出结果为：`0100001001001001`