A humorous lightning talk from PyCon NZ 2016.

1. Not Tom Eastman
by Not Katie McLaughlin

2. class TomEastman(object):
def whoami(self):
return 'Tom Eastman’
tom_eastman = TomEastman()
print(tom_eastman.whoami())
Tom Eastman

3. class KatieMcLaughlin(object):
def whoami(self):
return 'Katie McLaughlin’
katie_mclaughlin = KatieMcLaughlin()
print(katie_mclaughlin.whoami())
Katie McLaughlin

4. if not tom_eastman:
print('not Tom Eastman')
else:
print('Tom Eastman')
Tom Eastman

5. if not TomEastman:
print('not Tom Eastman')
else:
print('Tom Eastman')
Tom Eastman

6. if katie_mclaughlin is not tom_eastman:
print('Katie is not Tom')
else:
print('Katie is Tom')
Katie is not Tom

7. if katie_mclaughlin is not katie_mclaughlin:
print('Katie is not Katie')
else:
print('Katie is Katie')
Katie is Katie

8. if not isinstance(katie_mclaughlin, TomEastman):
print('Katie McLaughlin')
else:
print('not Katie McLaughlin')
Katie McLaughlin

9. from wrapt import ObjectProxy
class KatieMcLaughlin(ObjectProxy):
pass
tom_eastman = TomEastman()
katie_mclaughlin = KatieMcLaughlin(tom_eastman)
print(tom_eastman.whoami())
print(katie_mclaughlin.whoami())
Tom Eastman
Tom Eastman

10. if isinstance(katie_mclaughlin, TomEastman):
print('Tom Eastman')
else:
print('not Tom Eastman')
Tom Eastman

11. if isinstance(katie_mclaughlin, KatieMcLaughlin):
print('Katie McLaughlin')
else:
print('not Katie McLaughlin')
Katie McLaughlin

12. if type(katie_mclaughlin) == TomEastman:
print('Tom Eastman')
else:
print('not Tom Eastman')
not Tom Eastman

13. What have we learnt?

14. More than one way
to skin a cat

15. not
== !=
is is not
isinstance() type() __class__
__bool__() __int__()
id()

16. class GrahamDumpleton(object):
def whoami(self):
return 'Graham Dumpleton'
graham_dumpleton = GrahamDumpleton()
print(not isinstance(graham_dumpleton,
(TomEastman, KatieMcLaughlin)))
True