How to make and average of all ages in dictionary?

August 4, 2022

I am new to python and I am trying to count the number of males and females in a list and that worked but I do not know how to make the average of all the ages in the list.

user_list = [
    {'name': 'Alizom_12',
     'gender': 'f',
     'age': 34,
     'active_day': 170},
    {'name': 'Xzt4f',
     'gender': None,
     'age': None,
     'active_day': 1152},
    {'name': 'TomZ',
     'gender': 'm',
     'age': 24,
     'active_day': 15},
    {'name': 'Zxd975',
     'gender': None,
     'age': 44,
     'active_day': 752},
] 

def user_stat():
    from collections import Counter
    counts = Counter((user['gender'] for user in user_list))
    print(counts) 

user_stat()

>Solution :

def user_stat():
    # Here we get rid of the None elements
    user_list_filtered = list(filter(lambda x: isinstance(x['age'], int), user_list))

    # Here we sum the ages and divide them by the amount of "not-None" elements
    print(sum(i.get('age', 0) for i in user_list_filtered) / len(user_list_filtered))

    # If you want to divide by None-elements included
    print(sum(i.get('age', 0) for i in user_list_filtered) / len(user_list))

user_stat()