gistfile1.py

import xml.etree.ElementTree as ET


def get_hosts(tree_root):
    '''Takes an ETree root
    For every sin in a given xml_file, return a list containing the FQDN.
    '''
    return [server.get('host') for server in tree_root.iter('sin')]


def count_hosts(tree_root):
    '''Takes an ETree root
    For a given xml_file return the integer count of sins.
    count_hosts(env.xml)
    >>>24
    '''
    return len(tree_root.iter('sin'))
        
tree = ET.parse(some_xml_file)
root = tree.getroot()
hosts = get_hosts(root)
hosts_count = count_hosts(root)