从列表中打印特定项目 [英] Printing specific items out of a list

问题描述

我想知道如何从给出的列表 中打印特定项目:

I'm wondering how to print specific items from a list e.g. given:

li = [1,2,3,4]

我只想在一个循环中打印第3 ^rd 和第4 ^th ，并且我一直在尝试使用如下所示的for循环:

I want to print just the 3^rd and 4^th within a loop and I have been trying to use some kind of for-loop like the following:

for i in range (li(3,4)):
    print (li[i])

但是我遇到各种错误，例如:

However I'm Getting all kinds of error such as:

TypeError: list indices must be integers, not tuple.
TypeError: list object is not callable

我一直在尝试将()更改为[]，并反复拖拉单词以查看其是否有效，但到目前为止还没有.

I've been trying to change () for [] and been shuffling the words around to see if it would work but it hasn't so far.

推荐答案

使用切片符号可以获取所需项目的子列表:

Using slice notation you can get the sublist of items you want:

>>> li = [1,2,3,4]
>>> li[2:]
[3, 4]

然后遍历子列表:

>>> for item in li[2:]:
...     print item
... 
3
4

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