如何使用循环python构建列表
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/30381991/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to build a list using a loop python
提问by user1721230
How do I get items in a python loop to build a list. In php I would use something like this:
如何在 python 循环中获取项目以构建列表。在 php 中，我会使用这样的东西：
$ar1 = array("Bobs","Sams","Hymans");
foreach ($ar1 as $ar2){
$ar3[] = "$ar2 array item"; }
print_r($ar3);
which produces
产生
Array ( [0] => Bobs array item [1] => Sams array item [2] => Hymans array item )
$ar3[]stores the item in the foreach in an array.
$ar3[]将 foreach 中的项存储在数组中。
In Python i tried:
在 Python 中，我尝试过：
list1 = ("Bobs","Sams","Hymans");
foreach list2 in list1:
list3 = list2 + " list item"
print list3
which produces
产生
Hymans list item
But it doesn't return list3as a list and list3[]doesn't work. how do I get the loop to feed into the list?
但它不会list3作为列表返回并且list3[]不起作用。如何让循环输入列表？
采纳答案by datasci
This should get you started:
这应该让你开始：
list1 = ['Me','You','Sam']
list2 = ['Joe','Jen']
for item in list2:
list1.append(item)
list1 now is ['Me', 'You','Sam','Joe','Jen']
list1 现在是 ['Me', 'You','Sam','Joe','Jen']
If you want a third list, simply define it and append to it instead.
如果你想要第三个列表，只需定义它并附加到它。
回答by NendoTaka
So a couple of things are wrong with your code.
所以你的代码有一些问题。
First:
第一：
list = ("Bobs", "Sams", "Hymans");should be list = ["Bobs", "Sams", "Hymans"]
list = ("Bobs", "Sams", "Hymans");应该 list = ["Bobs", "Sams", "Hymans"]
Second:
第二：
foreach list2 in list1:
list3 = list2 + " list item"
should be
应该
list3 = []
for item in list1:
list3.append(item)
