with-blocks in python

with-blocks.py

class MyClass():
    def __init__(self, *args, **kwargs):
        print '>> init'
        self.label = kwargs.get('label')

    def __enter__(self):
        print '  >> enter'
        return self

    def __exit__(self, type, value, traceback):
        print '  << exit'

    def dump(self):
        print self.label


mc = MyClass(label = 'normal')
mc.dump()

with MyClass(label = 'using with') as mc:
    mc.dump()