How to get updated variable by a python function from another python function?

Question

I am trying to access an updated initialized variable by a python method to another python method in same class. Below is my sample code block.

class test(object):
    def __init__(self):
        self.a = []

    def test1(self):
        self.a = [1,2,3,4,5]
        print ("Output of test1 #", self.a)

    def test2(self):
        print ("Output of test2 #",self.a)
test().test1()
test().test2()

Output # Output of test1 # [1, 2, 3, 4, 5]
         Output of test2 # []

My understanding is if i Initialize a variable in __ init __(self) section then i can update the same variable from a method in the class and access the same variable from another method of same class. Correct me if my understanding is wrong.

"access the same variable from another module of same class.". Do you mean "access the same variable from another instance of same class." Or am I misunderstanding what you mean. — user707650
– user707650, Commented Apr 15, 2016 at 6:05
Here, however, you're creating two different instances of test. Instead: t = test(); t.test1(); t.test2() does what you want. You may want up a bit more on (Python) classes. — user707650
– user707650, Commented Apr 15, 2016 at 6:06

Ethan Furman · Accepted Answer · 2016-04-15 06:06:42Z

4

Instead of module, the word you want is method.

Your understanding is correct, but only for the same instance -- and you are creating two instances:

test().test1()
# ^- just created a new instance of test
test().test2()
# ^- just created another, different instance of test

What you want instead:

test_instance = test()
test_instance.test1()
test_instance.test2()

answered Apr 15, 2016 at 6:06

Ethan Furman

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Comments

DonerKebab · Accepted Answer · 2016-04-15 06:29:30Z

0

Because of test().test1() and test().test2() are two difference object. I think you should read more about Python OPP : https://docs.python.org/2/tutorial/classes.html

answered Apr 15, 2016 at 6:29

DonerKebab

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