类对象没有属性“get”

Question

I am trying to order a list user data, in the form of dictionaries, which contains random user data generated by an API. I am using .get to pull the date of birth (dob) from the dictionaries within the list to organize the data, but I keep getting the error "AttributeError: 'randomuser' object has no attribute 'get'". Since it seems that the problem is coming from the interaction with the 'randomuser' class, I tried side-stepping the class by placing the user data directing into a user dictionary in the main program loop, and this seemed to work. But as I am trying to learn OOP, any help in explaining where I am going wrong with the 'randomuser' class is appreciated! Cheers!

import requests
import json


class randomuser(object):
    
    def __init__(self, firstname, lastname, gender, username, password, dob) -> None:
        self.firstname = firstname
        self.lastname = lastname
        self.gender = gender
        self.username = username
        self.password = password
        self.dob = dob
        self.user_dict = {
            "firstname": self.firstname,
            "lastname": self.lastname,
            "gender": self.gender,
            "username": self.username,
            "password": self.password,
            "dob": self.dob
        }

    def __repr__(self):
        return str(self.user_dict)

""" 

create a 10 user list with 5 men and 5 women 
"""

male = 0
female = 0
user_list = []
while male < 5 or female < 5:

    response = requests.get("https://randomuser.me/api/")   # pulls JSON object from API
    user = json.loads(response.text)['results'][0]   # converst to Python dictionary
    firstname = user['name']["first"]
    lastname = user['name']["last"]
    gender = user['gender']
    username = user['login']['username']
    password = user['login']['password']
    dob = user['dob']['date']
    
    new_user = randomuser(firstname, lastname, gender, username, password, dob)

    if gender == 'male' and male < 5:
        male += 1
        user_list.append(new_user)
    elif gender == 'female' and female < 5:
        female += 1
        user_list.append(new_user)

"""

sort user list by DOB
"""

user_list.sort(key=lambda x: x.get('dob'))
print(user_list)

Answer 1

You have a list of classes, not dictionaries, so your lambda argument is a class without a get function

To sort by dob attribute, you'd do this

user_list.sort(key=lambda x: x.dob)

I'd also suggest using dataclasses or a NamedTuple rather than define user_dict , as you're only using this for printing