Python Count Elements in a List of Objects with Matching Attributes

Question

I am trying to find a simple and fast way of counting the number of Objects in a list that match a criteria. e.g.

class Person:
    def __init__(self, Name, Age,         


        

Answer 1

I know this is an old question but these days one stdlib way to do this would be

from collections import Counter

c = Counter(getattr(person, 'gender') for person in PeopleList)
# c now is a map of attribute values to counts -- eg: c['F']