OOP with context test and explanation

python-oop-with-context

#!/usr/bin/python
class Foo(object):
  def __init__(self):
    print('Initializing Foo')
  def __enter__(self):
    print('Entering Foo context')
    return self
  def __exit__(self, *args):
    print('Exiting Foo context')
  def Foomethod(self):
    print('Called Foomethod')


class Bar(object):
  def __init__(self, other):
    self.other = other
    print('Initializing Bar')
  def __enter__(self):
    print('Entering Bar context')
    return self
  def __exit__(self, *args):
    print('Exiting Bar context')
  def Barmethod(self):
    print('Called Barmethod')
  def Foomethodfrombar(self):
    print('Calling Foomethod from Bar class')
    self.other.Foomethod()
    print('Called Foomethod from Bar class')


if __name__ == '__main__':
  foo = Foo()
  with Foo() as foo, Bar(foo) as bar:
    print 'foo is an instance of ', type(foo)
    print 'bar is an instance of ', type(bar)
    foo.Foomethod()
    bar.Barmethod()
    bar.Foomethodfrombar()