在windows环境下，分别用c++语言和python语言建立管道通信，使得c++发送float数据python接收，能否给出代码示例

当然可以，以下是C语言和Python语言的示例代码：

C语言示例代码：

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>

int main()
{
    HANDLE hWritePipe;
    float send_f = 3.14159f;
    DWORD numBytesWritten;

    hWritePipe = CreateNamedPipe("\\\\.\\pipe\\test_pipe", PIPE_ACCESS_OUTBOUND, PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_WAIT, 1, 0, 0, INFINITE, NULL);
    if (hWritePipe == INVALID_HANDLE_VALUE)
    {
        printf("CreateNamedPipe failed\n");
        return -1;
    }

    if (ConnectNamedPipe(hWritePipe, NULL) != FALSE)
    {
        WriteFile(hWritePipe, &send_f, sizeof(float), &numBytesWritten, NULL);
    }

    CloseHandle(hWritePipe);
    return 0;
}

Python语言示例代码：

import win32pipe, win32file
import struct

read_handle = win32pipe.CreateNamedPipe(r'\\.\pipe\test_pipe', win32pipe.PIPE_ACCESS_DUPLEX, win32pipe.PIPE_TYPE_BYTE | win32pipe.PIPE_READMODE_BYTE | win32pipe.PIPE_WAIT, 1, 65536, 65536, 0, None)
win32pipe.ConnectNamedPipe(read_handle, None)
data = win32file.ReadFile(read_handle, 4)[1]
recv_f = struct.unpack('f', data)[0]
print(recv_f)

以上代码是简单的示例代码，请根据实际情况进行修改和优化。