Python: How do I pass variables between class instances or get the caller?

Question

class foo():
  def __init__(self)
    self.var1 = 1

class bar():
  def __init__(self):
    print \"foo var1\"

f = foo()
b = bar()

In foo, I am do

Answer 1

Something like:

class foo():
  def __init__(self)
    self.var1 = 1

class bar():
  def __init__(self, foo):
    print foo.var1

f = foo()
b = bar(foo)

You should be able to pass around objects in Python just like you pass around pointers in c++.