[FIXED] Python Class Functions and self using

Issue

I need to learn about the using variables on function in same class.

For example my class is like in below:

class MainWindow(QMainWindow):
    def __init__(self,parent = None):
        QMainWindow.__init__(self)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
    def myFunc1(self):
        self.myVariable = 5 

    def myFunc2(self):
        print(self.myVariable) #gives me 5

When I defined to variable like self.myVariable in myFunc1 I get its value from myFunc2. So If I use the self.does that make it a global variable ?

If I use like local variable in function, should i use it without self ?

Solution

Attributes that you assign to self under class methods are carried along with the self / object. So that when you create an attribute (such as in your example : self.myVariable=5 in one of the class method), you can reach to this attribute from other class methods, too.

And yes, if you want a local variable that borns and dies in a method, you don't need to attach it to self.

Answered By - Kubra Tas