How to get the size/length of sub-elements within an XML tag using python
Question: I'm newbie to python and I was wondering how to get the size or number of sub
elements within a parent tag lets say `participants`. The idea is to get the
number of `participant` within `participants` tag.

Here is the xml:

    
    
    <participants>
      <participant>
        <userId>James</userId>
        <role>Author</role>
      </participant>
      <participant>
        <userId>Alex</userId>
        <role>Reader</role>
      </participant>
    </participants>
    

I'm using xml:

`import xml.etree.ElementTree as ET` as the module

and `ET` is assigned `dom = ET.fromstring(output)`

so far, to parse xml, I have written the following code which works:

    
    
    for participant in dom.iter('participant'): 
        userId = participant.find('userId').text
        role = participant.find('role').text
    

But I want to get the size/length of number of `participant` in `participants`
tag and this is what I'm trying to do but it doesn't give me the length:

    
    
    print 'length', dom.findall('participants').length
    

The output I want should be:

    
    
    length 2
    


Answer: try

    
    
    print(len(dom.findall('participant')))
    

