英文:
Can i make variables work within If statements?
问题
如何使这个变量在Python的if语句中工作？
arrived = input('门铃响了吗？: ')
if arrived == 'yes' or arrived == 'Yes':
doorbell = input('是来自ifood吗？: ')
elif arrived == 'no' or arrived == 'No':
print('还没有，继续等待')
else:
print('请用是或否回答第一个问题')
if doorbell == 'yes' or doorbell == 'Yes':
print('您的ifood已经送到了！！！')
elif doorbell == 'no' or doorbell == 'No':
print('还不是您的ifood，继续等待')
else:
print('请用是或否回答问题')
我是个初学者，这开始作为一个练习，我已经搜索了一段时间，我知道在Python中变量是全局的，但有没有办法使它工作？
英文:
How can i make this variable work withing the if statement in python?
arrived = input('Have the doorbell ringed?: ')
if arrived == 'yes' or 'Yes':
doorbell = input('Is it from ifood?: ')
elif arrived == 'no' or 'No':
print('It is not here yet, keep waiting')
else:
print('Please answer the first question with yes or no')
if doorbell == 'yes' or 'Yes':
print('Your ifood have arrived!!!')
elif doorbell == 'no' or 'No':
print('It is not your ifood yet, keep waiting')
else:
print('Please answer the questions with yes or no')
I'm a beginner and this started as an exercice, i've been searching this for a while and i know variables are global in python but is there a way to make it work?
答案1
得分: 0
你的 if 是错误的。更好的写法是：
if arrived == 'yes' or arrived == 'Yes':
或者
if arrived in ['yes', 'Yes']:
英文:
Your if is wrong. Better is:
if arrived == 'yes' or arrived == 'Yes':
or
if arrived in ['yes','Yes']:
答案2
得分: 0
首先，你的if语句有误 - 它需要包括第二个arrived ==，否则它不会起作用。它应该是这样的。
if arrived == 'yes' or arrived == 'Yes':
其次，你可能想将第二个if-elif-else语句放在第一个if语句内部，因为它只应在第一个if语句的条件满足时触发。
完整解决方案：
arrived = input('门铃响了吗？: ')
if arrived == 'yes' or arrived == 'Yes':
doorbell = input('是来自ifood吗？: ')
if doorbell == 'yes' or doorbell == 'Yes':
print('你的ifood已经送到了！')
elif doorbell == 'no' or doorbell == 'No':
print('这不是你的ifood，请继续等待。')
else:
print('请用是或否回答问题。')
elif arrived == 'no' or arrived == 'No':
print('还没有送到，请继续等待。')
else:
print('请用是或否回答第一个问题。')
英文:
First, your if statement is wrong - it needs to include a second arrived == or it won't work. It should look like this.
if arrived == 'yes' or arrived == 'Yes':
Second, you probably want to chuck the second if-elif-else inside the first if statement, since it should only trigger if that if statement condition is fulfilled.
Full solution:
arrived = input('Have the doorbell ringed?: ')
if arrived == 'yes' or arrived == 'Yes':
doorbell = input('Is it from ifood?: ')
if doorbell == 'yes' or 'Yes':
print('Your ifood have arrived!!!')
elif doorbell == 'no' or 'No':
print('It is not your ifood yet, keep waiting')
else:
print('Please answer the questions with yes or no')
elif arrived == 'no' or arrived == 'No':
print('It is not here yet, keep waiting')
else:
print('Please answer the first question with yes or no')
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