How to display XML tree structure with Python?

[snippsat]

Just getting name of tags work fine in both lxml and BeautifulSoup.
Keeping the structure in output can be a challenge,
as both pretty print()lxml and prettify()BS i do not think work for text output.

Example getting tag names:

from lxml import etree
from bs4 import BeautifulSoup

xml = '''\
<data>
    <timestamp>...</timestamp>
    <people>
        <person>
            <name>...</name>
            <age>...</age>
        </person>
        <person>
            <name>...</name>
            <age>...</age>
            <degree />
        </person>
        <person>
            <name>...</name>
            <age>...</age>
            <degree />
            <siblings>
                <brother>...</brother>
                <brother>...</brother>
                <sister>...</sister>
            </siblings>
        </person>
    </people>
    <cities>
        <city>
            <name>...</name>
            <country>...</country>
            <continent>...</continent>
            <capital />
        </city>
        <city>
            <name>...</name>
            <country>...</country>
            <continent>...</continent>
        </city>
    </cities>
</data>
'''

root = etree.fromstring(xml)
soup = BeautifulSoup(xml, 'lxml')

# lxml
for node in root.iter('*'):
    print(node.tag)

# BS
for tag in soup.findChildren():
    print(tag.name)

Output:
data
timestamp
people
person
name
age
person
name
age
degree
person
name
age
degree
siblings
brother
brother
sister
cities
city
name
country
continent
capital
city
name
country
continent