How can i have 2 classes reference the same instance of a class
<p>I have class A class B and class C.</p>

<p>class A and B can affect class C. so they need to refer to the same instance of the class.</p>

<pre><code>#a.py
from C import C
Cinstance = C()
Cinstance.add()


#b.py
class b(object)
#i need to refer to 'cinstance' here to control the same instance of the class

#C.py
class C(object)
    def __init__(self):
        self.a=1

    def add(self):
        self.a += 1
        print a
</code></pre>

<p>How do i need to import and instanciate the classes for it to work this way? I am new to programming and still learning so things that are obvious are still a little difficult for me right now.</p>
