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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_cuts_from_xml(xmlfile):
 """Extract event selection strings from the XML file."""


    root = ElementTree.ElementTree(file=xmlfile).getroot()
    event_maps = root.findall('EventMap')
    alias_maps = root.findall('AliasDict')[0]

    event_classes = {}
    event_types = {}
    event_aliases = {}

    for m in event_maps:
        if m.attrib['altName'] == 'EVENT_CLASS':
            for c in m.findall('EventCategory'):
                event_classes[c.attrib['name']] = strip(
                    c.find('ShortCut').text)
        elif m.attrib['altName'] == 'EVENT_TYPE':
            for c in m.findall('EventCategory'):
                event_types[c.attrib['name']] = strip(c.find('ShortCut').text)

    for m in alias_maps.findall('Alias'):
        event_aliases[m.attrib['name']] = strip(m.text)

    replace_aliases(event_aliases, event_aliases.copy())
    replace_aliases(event_aliases, event_aliases.copy())
    replace_aliases(event_classes, event_aliases)
    replace_aliases(event_types, event_aliases)

    event_selections = {}
    event_selections.update(event_classes)
    event_selections.update(event_types)
    event_selections.update(event_aliases)

    return event_selections