如何在 Python 中显示列表元素的索引？
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How do I display the the index of a list element in Python?
提问by david
I have a homework assignment. I've got the following code
我有一个家庭作业。我有以下代码
hey = ["lol", "hey","water","pepsi","jam"]
for item in hey:
print(item)
Do I display the position in the list before the item, like this:
我是否在项目之前显示列表中的位置，如下所示：
1 lol
2 hey
3 water
4 pepsi
5 jam
采纳答案by Leejay Schmidt
The best method to solve this problem is to enumerate the list, which will give you a tuple that contains the index and the item. Using enumerate, that would be done as follows.
解决这个问题的最好方法是枚举列表，它会给你一个包含索引和项目的元组。使用enumerate，将按如下方式完成。
In Python 3:
在Python 3：
for (i, item) in enumerate(hey, start=1):
print(i, item)
Or in Python 2:
或在Python 2：
for (i, item) in enumerate(hey, start=1):
print i, item
If you need to know what Python version you are using, type python --versionin your command line.
如果您需要知道正在使用的 Python 版本，请python --version在命令行中输入。
回答by Baerus
Easy:
简单：
hey = ["lol","hey","water","pepsi","jam"]
for (num,item) in enumerate(hey):
print(num+1,item)
回答by Iron Fist
Use the startparameter of the enumeratebuit-in method:
使用内置方法的start参数enumerate：
>>> hey = ["lol", "hey","water","pepsi","jam"]
>>>
>>> for i, item in enumerate(hey, start=1):
print(i,item)
1 lol
2 hey
3 water
4 pepsi
5 jam
