code: def cudaMemcpy_dtoh(dst, src, count):
      
  
      status = _libcudart.cudaMemcpy(dst, src,
                                     ctypes.c_size_t(count),
                                     cudaMemcpyDeviceToHost)
      cudaCheckStatus(status)
docs: Copy memory from device to host.
  
      Copy data from device memory to host memory.
  
      Parameters
      ----------
      dst : ctypes pointer
          Host memory pointer.
      src : ctypes pointer
          Device memory pointer.
      count : int
          Number of bytes to copy.