[pygtk] gtk.Entry - how to move the cursor

[N. French]

I have a gtk.Entry subclass which allows the user to press the up/down
arrows to scroll thru history much like a shell prompt.  Works great. 
The only thing is when the user scrolls to a previous text the cursor
always ends up at the beginning of the line.  It appears the
gtk.Entry's cursor is a read-only thing.  Am I missing something here?

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