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blackknight.py
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44 lines (38 loc) · 1.26 KB
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"""
This class is inspired by the Black Knight scene in the movie
"Monty Python and the Holy Grail", where King Arthur fights the
Black Knight, slicing off his arms and legs, but the knight
refuses to concede defeat.
# tag::BLACK_KNIGHT_DEMO[]
>>> knight = BlackKnight()
>>> knight.member
next member is:
'an arm'
>>> del knight.member
BLACK KNIGHT (loses an arm) -- 'Tis but a scratch.
>>> del knight.member
BLACK KNIGHT (loses another arm) -- It's just a flesh wound.
>>> del knight.member
BLACK KNIGHT (loses a leg) -- I'm invincible!
>>> del knight.member
BLACK KNIGHT (loses another leg) -- All right, we'll call it a draw.
# end::BLACK_KNIGHT_DEMO[]
"""
# tag::BLACK_KNIGHT[]
class BlackKnight:
def __init__(self):
self.phrases = [
('an arm', "'Tis but a scratch."),
('another arm', "It's just a flesh wound."),
('a leg', "I'm invincible!"),
('another leg', "All right, we'll call it a draw.")
]
@property
def member(self):
print('next member is:')
return self.phrases[0][0]
@member.deleter
def member(self):
member, text = self.phrases.pop(0)
print(f'BLACK KNIGHT (loses {member}) -- {text}')
# end::BLACK_KNIGHT[]