Thanks Robert Kern : "prettyprint" ; indent() does the trick ;-)
>ElementTree writes exactly what you tell it to. In XML, whitespace is >significant. If you want newlines and/or indentation to make it pretty-looking, >then you need to add those to your elements. > >Fredrik provides an example function for doing this: > > http://effbot.org/zone/element-lib.htm#prettyprint
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