copying all data(tags and values) after a particular XML tag

[bijeshn at gmail.com]

i've an XML file with the following structure....

<a>
<b>
<c>
.
.
.
.
.</c>
</b>
</a>

what i want to do is copy all data(tags and all) between N and N+k
appearances of <c>. I am a python newbie. How do I do it?

Thanks.