import xml.etree.ElementTree as ET

rfile = 'sample.osm'
tree = ET.parse(rfile)
root = tree.getroot()

print('root tag: {}'.format(root.tag))
print('root attrib: {}'.format(root.attrib))

for child in root:
    print('child tag: {}'.format(child.tag))
    print('child attrib: {}'.format(child.attrib))