英文:
If a value of a user input is in a list, how can I use this input value in a new method?
问题
给定一个列表 ["a", "b", "c"]
接着是一个空列表 []
我希望用户输入一个值。
如果这个值出现在列表中，我希望该项从列表中跳到空列表。
到目前为止，我得到了这个：
列表 = ["a", "b", "c"]
空列表 = []
x = input("用户输入：")
if x in 列表:
空列表.append(列表.pop(列表.index(x)))
print
问题是：我如何定义用户输入，使其对应于列表中的正确索引位置？
我希望我表达清楚了。
英文:
Given a list ["a", "b", "c"]
followed by an empty list []
I want the user to input a value.
If this value appears on the list, I want the item to jump from the list to the empty one.
so far I got this:
list = ["a", "b", "c"]
empty_list = []
x = input("user_input: ")
if x in list:
empty_list.append(list.pop(*how do I define this?*))
print
the problem is: How do I define the input of the user such that it corresponds to the right index within the list?
I hope I've made myself clear.
I did not really try anything since I have no clue what to do. All I did was to look things up but so far no result.
答案1
得分: 0
欢迎来到SO，
你没有声明你正在使用的编程语言，但从我看到的情况来看，这是Python？
你需要找出该值的列表索引，在Python中，可以使用list.index(value)。我为了更好的可读性，重命名了一些变量，但代码本质上是你的：
allowed_inputs = ["a", "b", "c"]
given_inputs = []
x = input("user_input: ")
if x in allowed_inputs:
given_inputs.append(allowed_inputs.pop(allowed_inputs.index(x)))
不过要注意，你的print语句目前不会打印任何东西。我不确定你想要打印什么，是given_inputs的当前内容吗？
如果是的话，你可能想使用print(given_inputs)。
英文:
Welcome to SO,
you didn't declare the language you are programming in, but from what I see this is Python?
You will need to figure out the list index for the value, in Python it would be list.index(value). I renamed a few variables for better understandability but the code is otherwise yours:
allowed_inputs = ["a", "b", "c"]
given_inputs = []
x = input("user_input: ")
if x in allowed_inputs:
given_inputs.append(allowed_inputs.pop(allowed_inputs.index(x)))
print
Note however that your print statement does not print anything at the moment. I am not sure what you would like to print, the current contents of the given_inputs ?
In that case you might want to use print(given_inputs) instead.
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