code: def cublasZsymv(handle, uplo, n, alpha, A, lda, x, incx, beta, y, incy):
      
  
      status = _libcublas.cublasZsymv_v2(handle, 
                                          _CUBLAS_FILL_MODE[uplo], n, 
                                          ctypes.byref(cuda.cuDoubleComplex(alpha.real,
                                                                              alpha.imag)), 
                                          int(A), lda, int(x), incx, 
                                          ctypes.byref(cuda.cuDoubleComplex(beta.real,
                                                                              beta.imag)), 
                                          int(y), incy)
      cublasCheckStatus(status)
docs: Matrix-vector product for complex symmetric matrix.