Python ElementTree: How to add SubElement at VERY specific position?
Question: I want to add a subelement to an xml file, but in a very specific position,
not appended to the end.

The standard way is:

    
    
    subi = ET.SubElement(root[0][0], 'subi')
    

which is fine.

but: Let's say, root[0][0] already has two children, hence accessible via
root[0][0][0] and root[0][0][1].

And I want "subi" to become the new middle child, root[0][0][1], making the
original second child become the third child root[0][0][2].

Is there a way to do that? (My experiences with life and nature would say no,
but I have high hopes for python=)


Answer: You can use
[`Element.insert`](https://docs.python.org/2/library/xml.etree.elementtree.html#xml.etree.ElementTree.Element.insert)
method. It allows you to specify an index.

For example, to insert before the 3rd (index: 2) element:

    
    
    >>> import xml.etree.ElementTree as ET
    >>>
    >>> root = ET.fromstring('''
    ... <root>
    ...     <first></first>
    ...     <second></second>
    ...     <third></third>
    ... </root>
    ... ''')
    >>>
    >>> new = ET.Element('new')
    >>> root.insert(2, new)  # <-----------
    >>> print(ET.tostring(root))
    <root>
        <first />
        <second />
        <new /><third />
    </root>
    

