我目前正在研究 Zed Shaw 的 Learn Python the Hard Way。
在exercise 35 , 找到一个包含这些行的程序:
def bear_room():
print "There is a bear here."
print "The bear has a bunch of honey."
print "The fat bear is in front of another door."
print "How are you going to move the bear?"
bear_moved = False
while True:
next = raw_input("> ")
if next == "take honey":
dead("The bear looks at you then slaps your face off.")
elif next == "taunt bear" and not bear_moved:
print "The bear has moved from the door. You can go through it now."
bear_moved = True
elif next == "taunt bear" and bear_moved:
dead("The bear gets pissed off and chews your leg off.")
elif next == "open door" and bear_moved:
gold_room()
else:
print "I got no idea what that means."
一切顺利。但我想在输掉比赛之前给玩家额外的生存机会和警告。我想到了这个:
def bear_room():
print "There is a bear here."
print "There bear has a bunch of honey."
print "The fat bear is in front of another door."
print "How are you going to move the bear?"
bear_moved = False
bear_moved_again = False
while True:
next = raw_input("> ")
if next == "take honey":
dead("The bear looks at you then slaps your face off.")
elif next == "taunt bear" and not bear_moved:
print "The bear as moved from the door. You can go through it now."
bear_moved = True
elif next == "taunt bear" and bear_moved:
print "The bear is getting angry. Don't taunt him again."
bear_moved_again = True
elif next == "taunt bear" and bear_moved_again:
dead("The bear gets pissed off and chews your leg off.")
elif next == "open door" and bear_moved:
gold_room()
else:
print "I got no idea what that means."
不起作用:如果我多次 mock 熊，我得到的只是:“熊生气了。不要再 mock 他了。”字符串，一遍又一遍，然而，我希望玩家在输掉之前只能 mock 动物两次(第一次移动它，第二次得到警告)。你知道为什么吗？
另一个问题:如果 bear_moved 设置为 False(第 6 行)，并且(第 13 行)说:
elif next == "taunt bear" and not bear_moved:
不会“并且不会”将 bear_moved 设置为 True 吗？
如有任何帮助，我们将不胜感激。
请您参考如下方法:
换行
elif next == "taunt bear" and bear_moved:
到
elif next == "taunt bear" and bear_moved and not bear_moved_again:
和线
elif next == "taunt bear" and bear_moved_again:
到
elif next == "taunt bear" and bear_moved and bear_moved_again:
在您的原始版本中，句子“elif next == “taunt bear”和 bear_moved:”在“elif next == “taunt bear”和 bear_moved_again”之前进行了测试。如果您多次输入“taunt bear”，“elif next == "taunt bear"and not bear_moved”和“elif next == “taunt bear” and bear_moved”之一将始终为真。测试“elif next == “taunt bear”和 bear_moved_again”将永远不会被采用。
