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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_nameid_data(self):
 """ Gets the NameID Data provided by the SAML Response from the IdP :returns: Name ID Data (Value, Format, NameQualifier, SPNameQualifier) :rtype: dict """

        nameid = None
        nameid_data = {}

        encrypted_id_data_nodes = self.__query_assertion('/saml:Subject/saml:EncryptedID/xenc:EncryptedData')
        if encrypted_id_data_nodes:
            encrypted_data = encrypted_id_data_nodes[0]
            key = self.__settings.get_sp_key()
            nameid = OneLogin_Saml2_Utils.decrypt_element(encrypted_data, key)
        else:
            nameid_nodes = self.__query_assertion('/saml:Subject/saml:NameID')
            if nameid_nodes:
                nameid = nameid_nodes[0]

        is_strict = self.__settings.is_strict()
        want_nameid = self.__settings.get_security_data().get('wantNameId', True)
        if nameid is None:
            if is_strict and want_nameid:
                raise OneLogin_Saml2_ValidationError(
                    'NameID not found in the assertion of the Response',
                    OneLogin_Saml2_ValidationError.NO_NAMEID
                )
        else:
            if is_strict and want_nameid and not OneLogin_Saml2_Utils.element_text(nameid):
                raise OneLogin_Saml2_ValidationError(
                    'An empty NameID value found',
                    OneLogin_Saml2_ValidationError.EMPTY_NAMEID
                )

            nameid_data = {'Value': OneLogin_Saml2_Utils.element_text(nameid)}
            for attr in ['Format', 'SPNameQualifier', 'NameQualifier']:
                value = nameid.get(attr, None)
                if value:
                    if is_strict and attr == 'SPNameQualifier':
                        sp_data = self.__settings.get_sp_data()
                        sp_entity_id = sp_data.get('entityId', '')
                        if sp_entity_id != value:
                            raise OneLogin_Saml2_ValidationError(
                                'The SPNameQualifier value mistmatch the SP entityID value.',
                                OneLogin_Saml2_ValidationError.SP_NAME_QUALIFIER_NAME_MISMATCH
                            )

                    nameid_data[attr] = value
        return nameid_data