Attributeerror 'str' Object Has No Attribute

I am new to python and I get stuck in this error. I want to print names and years of birth of animals in team in an order by the name. Now I am keeping getting printing years and n

Solution 1:

Here is another possible solution:

In order to print an object of any class that you created, you must implement the __str__() method or the __repr__() method as an official string representation of your objects. So, here is the modified Animal class:

classAnimal:
    def__init__(self, name, year_of_birth):
        self.name = name
        self.year_of_birth = year_of_birth # Added this field because your created Animal objects had it in the example.def__str__(self):
        return self.name + " " + str(self.year_of_birth)

    def__repr__(self):
        return self.name + " " + str(self.year_of_birth)

Next thing, I simplified your add_member() method because there was no reason for self.member = member:

defadd_member(self, member):
        self.members.append(member)

Next, I modified your print_team() function like this:

defprint_team(team):
    list_members= []
    for member in team.members:
        list_members.append(member)

    print("Unsorted: ")
    print (list_members)

    list_members.sort(key = lambda animal: animal.name)

    print("Sorted by name: ")
    print (list_members)

You can simply append any object of type Animal in the list_members list. After that, you can sort your list using sort() and then print it. The code below:

team = Team('Wolves',2015)
team.add_member(Animal('Josh',2015))
team.add_member(Animal('Quinn',2145))
team.add_member(Animal('Peter',3000))
print_team(team)  

Produces the following result:

Unsorted: 
[Josh2015, Quinn2145, Peter3000]
Sorted by name: 
[Josh2015, Peter3000, Quinn2145]