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tripledoo.py
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tripledoo.py
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# __________________
#
# TRIPLE DOOHICKEY
# __________________
#
#
# A triple doohickey contains three Doohickies
# and combines their results to return three letter
# strings.
from doohickey import Doohickey
class TripleDoohickey(object):
def __init__(self):
self.first = Doohickey()
self.second = Doohickey()
self.third = Doohickey()
self.a()
def a(self):
"""Returns 'aba' and sets the Doohickies to a, b, and a.
>>> doo = TripleDoohickey()
>>> doo.a()
'aba'
"""
result = ''
result += self.first.a()
result += self.second.b()
result += self.third.a()
return result
def b(self):
"""Returns 'bab' and sets the Doohickies to b, a and b.
>>> doo = TripleDoohickey()
>>> doo.b()
'bab'
"""
result = ''
result += self.first.b()
result += self.second.a()
result += self.third.b()
return result
def other(self):
"""Returns the opposite of the last time, or 'bab' at first.
>>> doo = TripleDoohickey()
>>> doo.other()
'bab'
>>> doo.other()
'aba'
>>> doo.a()
'aba'
>>> doo.other()
'bab'
>>> doo.b()
'bab'
>>> doo.other()
'aba'
>>> doo.other()
'bab'
>>> doo.other()
'aba'
"""
result = ''
result += self.first.other()
result += self.second.other()
result += self.third.other()
return result
if __name__ == '__main__':
import doctest
doctest.testmod()