We had a task in school about classes and i got a mistake in my code...

Question

We had the task to create a class person with some methods like getname, getage and so on. Finally there should be a list with some names. The names should be implemented into the class and finally into the empty list "friends" I wrote this, but obviusly there are some mistakes i don't find. Can you help me, please? :)

here is my code:

# -*- coding: utf-8 -*-
"""
Created on Mon Jul 17 13:35:51 2017

@author: Anika
"""
import random

class Person(object):

def __init__(self,name):
self.name=name
self.age=int(random.randint(1,100))

def getname(self):
return self.name

def getage(self):
return self.age

def birthday(self):
self.age +=1
return self.age

def __str__(self):
return self.name +' is '+ self.age +' years old.'

Names=['Harry','Ron','Hermoine','Ginny','Hedwig']
Friends=[]

i=0

while i<len(Names):

j=Person(Names[i])
Friends.append(j)
print (Friends)
i+=1

Answer 1

Hi @Anika,

I modified your code a bit, so here it goes:

import random

class Person(object):

def __init__(self,name):
self.name=name
self.age=int(random.randint(1,100))

def getname(self):
return self.name

def getage(self):
return self.age

def birthday(self):
self.age +=1
return self.age

def __str__(self):
return self.name +' is '+ str(self.age)+' years old.'

Names=['Dumbledore','Harry','Ron','Hermione','Hagrid','Ginny','Hedwig','Scabbers','Crookshanks']
Friends=[]

i=0

while i<len(Names):

j=Person(Names[i])
Friends.append(j)
print (str(Friends[i]))
i+=1

Answer 2

I changed the __str__(self) to use str(self.age) because of type conversion error.

And inside the while loop I use print(str(Friends[i])) instead of print(Friends). The str() function invokes the __str__ function from Person class, the __str__ function overrides default str() function, cmiiw.

Btw, I see you misspelled Hermione as Hermoine, and I added some other character names just for fun.

Hth, Cheers!

Answer 3

:D Thanks a lot!! it works! and Harry is 77 years old ;P