How to output multiple types of binary files in one file (python)

Question

I'm trying to output the DF to a binary file with one line. I'll show you a simple example.(In reality, it consists of hundreds of millions of rows of data.).

1. A1 should be uint32_t, B2 should be float32, and C3 should be uint32_t.

2. 'Little endian encoding' is required.

    df =
    A1 B2 C3
   
    1  7  13
    2  8  14
    3  9  15
    4 10  16
    5 11  17
    6 12  18
   

   The expected result after output is as follows.

    Binary file =
    1(uint32) 7(float32) 13(uint32) 2(uint32) 8(float32) 14(uint32) 3(uint32) 9(float32) 15(uint32) 4(uint32) 10(float32) 16(uint32) 5(uint32) 11(float32) 17(uint32) 6(uint32) 12(float32) 18(uint32)
   

   What should I do? Please help.