So, programming in Python 3, I've got a program with a problem whose essence I've distilled in this (non)functional piece of code:
class One:
def __init__(self):
self.var1 = 1
def change(self):
two.var2 = 5
class Two:
def __init__(self):
one = One()
self.var2 = 2
one.change()
two = Two()
The IDLE interpreter throws:
> Traceback (most recent call last):
File "C:/-", line 15, in <module>
two = Two()
File "C:/-", line 12, in __init__
one.change()
File "C:/-", line 6, in change
two.var2 = 5
NameError: name 'two' is not defined
Apparently, doing this instead:
class One:
def __init__(self):
self.var1 = 1
def change(self):
two.var2 = 5
class Two:
def __init__(self):
self.var2 = 2
one.change()
one = One()
two = Two()
...doesn't help, as it gives me the exact same type of error. I really don't understand why this is happening... or how to structure it differently. I think the last time I had a problem like this I avoided it by nesting classes (rather messy and worked for only one level of nesting, as far as I can remember), but I'd really like to know how to make these two objects communicate with each other properly.
Edit: What I have is a program whose only line of code instantiates a main class, let's call it "Earth". In this program-object everything happens, included the instantiation of other classes; let's assume it's only one in this case, and call it "Moon". What I want to do is have this object Moon be able to change the Earth's states, its different variables.
As I see it, you just have to pass to one.change() which object you want to change
class One:
def __init__(self):
self.var1 = 1
def change(self, two):
two.var2 = 5
class Two:
def __init__(self):
self.var2 = 2
one.change(self)
one = One()
two = Two()