problems with return "None" in Python

  

AttributeError: 'NoneType' object has no attribute 'text'

Follow the code used:

    def list_all_political_parties():

    base_url = "http://legis.senado.gov.br/dadosabertos/senador/partidos"

    data = requests.get(url=base_url)
    data_to_dict = xmltodict.parse(data.content)
    data_to_xml = dicttoxml.dicttoxml(data_to_dict)

    root = elements.fromstring(data_to_xml)
    levels = root.findall('.//Partido')
    for level in levels:
        code = level.find('Codigo').text
        initials = level.find('Sigla').text
        name = level.find('Nome').text
        creation_date = level.find('DataCriacao').text
        print(code, initials, name, creation_date)

list_all_political_parties()

When I try to run the code without the "text" attribute, print occurs as:

  

(None, None, None, None)

The weird thing is that a get in link returns an xml with several data, so I believe that by my mistake, some data has been lost in the return.

Could someone give me a hint on how to solve this?

Thanks in advance for your attention and help:)