I cannot find out why the following code generates the error:
Traceback (most recent call last):
File "D:/a/Utilities/python/ptyhon22/test.py", line 97, in ?
main()
File "D:/a/Utilities/python/ptyhon22/test.py", line 60, in main
crit = Critter(crit_name)
File "D:/a/Utilities/python/ptyhon22/test.py", line 8, in __init__
self.feed = feed # I wrote this
AttributeError: can't set attribute
I add some codes to a program on a book. The lines that have "I wrote
this" comment is the added codes. Could anyone tell me what is worng
here?
--------------
##
class Critter(object):
"""A virtual pet"""
def __init__(self, name, hunger = 0, boredom = 0, feed = 0):
self.name = name
self.hunger = hunger
self.boredom = boredom
self.feed = feed # I wrote this
def __pass_time(self):
self.hunger += 1
self.boredom += 1
def __feed_time(self): # I worte this
self.feed += 1 # I wote this
def __get_feed(self): # I wrote this
return self.feed # I worte this
feed = property(__get_feed) # I wrote this
def __get_mood(self):
unhappiness = self.hunger + self.boredom
if unhappiness < 5:
mood = "happy"
elif 5 <= unhappiness <= 10:
mood = "okay"
elif 11 <= unhappiness <= 15:
mood = "frustrated"
else:
mood = "mad"
return mood
mood = property(__get_mood)
def talk(self):
print "I'm", self.name, "and I feel", self.mood, "now.\n"
self.__pass_time()
def eat(self, food = 4):
print "Brruppp. Thank you."
self.hunger -= food
self.__feed_time() # I wrote this
print self.feed # I wrote this
if self.hunger < 0:
self.hunger = 0
self.__pass_time()
def play(self, fun = 4):
print "Wheee!"
self.boredom -= fun
if self.boredom < 0:
self.boredom = 0
self.__pass_time()
##
def main():
crit_name = raw_input("What do you want to name your critter?: ")
crit = Critter(crit_name)
choice = None
while choice != "0":
print \
"""
Critter Caretaker
0 - Quit
1 - Listen to your critter
2 - Feed your critter
3 - Play with your critter
"""
choice = raw_input("Choice: ")
print
# exit
if choice == "0":
print "Good-bye."
# listen to your critter
elif choice == "1":
crit.talk()
# feed your critter
elif choice == "2":
crit.eat()
# play with your critter
elif choice == "3":
crit.play()
# some unknown choice
else:
print "\nSorry, but", choice, "isn't a valid choice."
main()
("\n\nPress the enter key to exit.")
--
http://mail.python.org/mailman/listinfo/python-list
