How can I reach a private variable within the object

Question

I would like to modify an object private variable

class Example():
    __myTest1 = 1
    __myTest2 = 1
    def __init__(self):
        pass
    def modifyTes         


        

Answer 1

class Example():
    __myTest1 = 1
    __myTest2 = 1
    def __init__(self):
        pass
    def modifyTest(self, name, value):
        setattr(self, '__my'+name, value)

Optional variables must come after mandatory variables.

Answer 2

Try adding a single underscore and the class name to the beginning of the variable.

def modifyTest(name = 'Test1', value):
    setattr(self, '_Example__my' + name, value)

Answer 3

Accessing from outside:

e = Example()
e._Example__myTest1   # 1

Due to private variable name mangling rules.

But if you need to access private members, it is an indication of something wrong in your design.

If you need to access or update it from within the class itself:

class Example():
    __myTest1 = 1
    __myTest2 = 1
    def __init__(self):
        pass

    @classmethod
    def modifyTest(cls, value, name="Test1"):
        setattr(cls, '_%s__my%s' % (cls.__name__, name), value)

This must be done because it is a private class-static variable and not a private instance variable (in which case it would be straightforward)