MusicXML converter: "ImportError: No module named musicxml"

[Gerhard G. Tooorges]

Hello!

I am new to Lilypond.

At the moment, I do all of my work — I am a music teacher and arranger — in Sibelius 4.
I used to look on the Lilpond homepage form time to time, because I somehow like the project.
The engraving gets better and better, thus the "tweaks" (optical spacing etc.)
Today I found "MusicXML converter added" in the news section.

And I wanted to try it.
But, unfortunately, typing

gerhard% ./musicxml2ly

only results in

Traceback (most recent call last):
  File "./musicxml2ly", line 27, in ?
    import musicxml
ImportError: No module named musicxml

Is there anything I can do about it?

Where is the missing module?


Gerhard