AttributeError: 'NoneType' object has no attribute 'values' code example

Example 1: 'NoneType' object has no attribute 'attname'

super().__init__(*args, **kwargs)

Example 2: AttributeError: 'NoneType' object has no attribute

node = child.find('EmentaMateria')
if node is not None:
    ementa = node.text
else:
    ementa = None