Print a list of objects as string in Python

Question

I am making a program in python(2,7) where I take texts from a file,and storing as objects in a list, I would like to print the list but only returns the addresses, I am learning to program in python and no answer I find for it serves me. How can I print this as a string?

Example of the file:(I don’t know how to leave in the correct format but between the spaces there is a tab) 3 s 43-12 31

Class that functions as a struct:

class Expressao(object):

def __init__(self, nivel, tipo, expressao, resposta):
    self.nivel = nivel
    self.tipo = tipo
    self.expressao = expressao
    self.resposta = resposta

Class that takes the file and stores it in a list as objects:

class FonteDeExpressoes(object):
import csv
def lista (self):
    expressoes = []
    with open('exp.txt') as f:
        for line in f:
            row = line.split('\t')
            exp = Expressao(row[0], row[1], row[2], row[3])
            expressoes.append(exp)
    #print expressoes
    return expressoes

Output from Print Fontedeexpressions(). list()

[<__main__.Expressao object at 0x7f09343ad710>, <__main__.Expressao object at 0x7f093b7e25d0>, <__main__.Expressao object at 0x7f093b7e2e90>, <__main__.Expressao object at 0x7f0934017050>, <__main__.Expressao object at 0x7f0934017090>, <__main__.Expressao object at 0x7f09340170d0>, <__main__.Expressao object at 0x7f0934017110>, <__main__.Expressao object at 0x7f0934017150>, <__main__.Expressao object at 0x7f0934017190>, <__main__.Expressao object at 0x7f09340171d0>, <__main__.Expressao object at 0x7f0934017210>, <__main__.Expressao object at 0x7f0934017250>, <__main__.Expressao object at 0x7f0934017290>, <__main__.Expressao object at 0x7f09340172d0>, <__main__.Expressao object at 0x7f0934017310>, <__main__.Expressao object at 0x7f0934017350>, <__main__.Expressao object at 0x7f0934017390>, <__main__.Expressao object at 0x7f09340173d0>, <__main__.Expressao object at 0x7f0934017410>, <__main__.Expressao object at 0x7f0934017450>, <__main__.Expressao object at 0x7f0934017490>, 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Answer 1

Define a method in your class __repr__():

class Expressao(object):
    def __init__(self, nivel, tipo, expressao, resposta):
        self.nivel = nivel
        self.tipo = tipo
        self.expressao = expressao
        self.resposta = resposta

    def __repr__(self):
        return self.nivel + ", " + self.tipo + ", " + self.expressao + ", " + self.resposta

When printing the object, its values should appear separated by commas.

>>> e = Expressao('3', 's', '43-12', '31')
>>> e
3, s, 43-12, 31