title: how to change attribute of parent class
body: <p>I have two classes. In the object oriented methodology, I can change parent attribute from low level class. In python, how can I change variable of the parents from other class ? What I have </p>
  
  <pre><code>class Concurrent( threading.Thread):
      def __init__(self):
           self.rec = Rec()
           self.rec.start()
           self.parentvar = None # I have change this variable
           self.secondParentVar = [] # or use this
  
  class Rec(Concurrent):
      def run(self):
          # from here, change variable of the parent Conccurent class variable
  </code></pre>