[python-win32] Excel columnwise writing

[Nicholas]

I am writing to arrays to excel. If I write row-wise everything works well.
app.Range('d4:f4').Value = [2,3,4]
However if I try to assign column wise everything goes wrong
app.Range('d4:d6').Value = [2,3,4]    <gives[2,2,2]>

I know I can rearrage things like [[i] for i in  [2,3,4]] but it does
not seem terribly efficient. Is there some trick which can allow me to
write column wise with good performance?