Python比较输入和布尔表达式
Python比较输入和布尔表达式
提问于 2016-06-05 18:30:41
刚接触到蟒蛇。我正在编写这段代码，在我的一生中，当游泳和自行车的输入是'Y‘和'N’的组合时，我无法让我的程序打印code语句(yourName，‘’)。我做错什么了？
def main():
yourName = input("What is the your name? ")
swim = input("Can you swim <Y>es or <N>o? ")
cycling = input("Can you cycle <Y>es or <N>o? ")
if swim and cycling is 'Y' or swim and cycling is 'y':
print(yourName, 'is an athlete.')
elif swim and cycling is 'N' or swim and cycling is 'n':
print(yourName,'shows potential.')
else:
print(yourName,'needs practise')
main()回答 3
Stack Overflow用户
回答已采纳
发布于 2016-06-05 18:50:13
你可以这样做：
if swim.lower() == <char> <conditional operator> cycling.lower() == <char> :
其中char是'y‘或'n’。
def main():
yourName = input("What is the your name? ")
swim = input("Can you swim <Y>es or <N>o? ")
cycling = input("Can you cycle <Y>es or <N>o? ")
is_swim = swim.lower()
is_cycle = cycling.lower()
if is_swim == 'y' and is_swim == 'y':
print(yourName, 'is an athlete.')
elif is_swim == 'y' or is_cycle == 'y':
print(yourName,'shows potential.')
else:
print(yourName,'needs practise')
main()str.lower()将字符串转换为小写。
Stack Overflow用户
发布于 2016-06-05 18:39:00
您需要将条件更改为：
if swim is 'Y' and cycling is 'Y' or swim is 'y' and cycling is 'y':在python中，对于上面的例子，如果游泳:将表示是否存在游泳，在本例中，这是正确的。
Stack Overflow用户
发布于 2016-06-05 18:51:36
在这里，你还没有完全清楚你想要的逻辑，但如果目标是打印“显示潜力”(如果是游泳或自行车的话)，如果两者都是运动员，那么“需要练习”(如果两者都没有)，下面的代码是一个更易读的选项。
def main():
yourName = input("What is the your name? ")
swim = input("Can you swim <Y>es or <N>o? ")
cycling = input("Can you cycle <Y>es or <N>o? ")
swims = swim and swim.upper() == "Y"
cycles = cycling and cycling.upper() == "Y"
if swims and cycles:
print(yourName, 'is an athlete.')
elif (swims or cycles):
print(yourName,'shows potential.')
else:
print(yourName,'needs practise')
main()页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/37645375
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