On 21/04/2011 18:12, Pascal J. Bourguignon wrote:
chad<cdal...@gmail.com> writes:
Let's say I have the following....
class BaseHandler:
def foo(self):
print "Hello"
class HomeHandler(BaseHandler):
pass
Then I do the following...
test = HomeHandler()
test.foo()
How can HomeHandler call foo() when I never created an instance of
BaseHandler?
But you created one!
No, he didn't, he created an instance of HomeHandler.
test is an instance of HomeHandler, which is a subclass of BaseHandler,
so test is also an instance of BaseHandler.
test isn't really an instance of BaseHandler, it's an instance of
HomeHandler, which is a subclass of BaseHandler.
If you do this:
class BaseHandler(object):
def foo(self):
print "Hello"
class HomeHandler(BaseHandler):
pass
test = HomeHandler()
then you'll find:
>>> isinstance(test, BaseHandler)
True
but:
>>> type(test)
<class '__main__.HomeHandler'>
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