在python中重构这个字典到xml的转换器

import xml.etree.ElementTree as ET

def dict_to_xml(tag, dictionary):
    elem = ET.Element(tag)
    for key, val in dictionary.items():
        child = ET.Element(key)
        child.text = str(val)
        elem.append(child)
    return elem

my_dict = {
    'name': 'John',
    'age': 30,
    'city': 'New York'
}

xml_data = dict_to_xml('person', my_dict)
print(ET.tostring(xml_data, encoding='unicode'))

  <name>John</name>
  <age>30</age>
  <city>New York</city>
</person>