Get the object with the max attribute value in a list of objects [duplicate]

Answer 1

You can use operator.attrgetter and the key parameter of max:

from operator import attrgetter
ancestor = max(nodes_ancestors, key=attrgetter('level'))

Below is a demonstration:

>>> from operator import attrgetter
>>> class Obj:
...     def __init__(self, val):
...         self.attr = val
...
>>> lst = [Obj(x) for x in range(10)]
>>> obj = max(lst, key=attrgetter('attr'))
>>> obj
<__main__.Obj object at 0x021C2290>
>>> obj.attr
9
>>>