在列表中打印给定字典键的所有值(Print all values of a given key of dictionaries in a list)

在列表中打印给定字典键的所有值(Print all values of a given key of dictionaries in a list)

我有一个看起来像这样的字典列表：

list =[{"id": 1, "status": "new", "date_created": "09/13/2013"}, {"id": 2, "status": "pending", "date_created": "09/11/2013"}, {"id": 3, "status": "closed", "date_created": "09/10/2013"}]

我想要做的是能够打印这个与“id”相关的词典列表中的所有值。如果它只是一个词典，我知道我可以这样做：

print list["id"]

如果它只是一个字典，但我如何为字典列表执行此操作？ 我试过了：

for i in list: print i['id']

但我得到一个错误说

TypeError: string indices must be integers, not str

有人能帮我一把吗？ 谢谢！

I have a list of dictionaries that looks something like this:

list =[{"id": 1, "status": "new", "date_created": "09/13/2013"}, {"id": 2, "status": "pending", "date_created": "09/11/2013"}, {"id": 3, "status": "closed", "date_created": "09/10/2013"}]

What i want to do is be able to print all of the values in this list of dictionaries that relate to "id" If it was just 1 dictionary i know i could do like:

print list["id"]

If it was just one dictionary, but how do i do this for a list of dictionaries? I tried:

for i in list: print i['id']

but i get an error that says

TypeError: string indices must be integers, not str

Can someone give me a hand? Thanks!

最满意答案

在代码的某个地方，您的变量被重新分配了一个字符串值，而不是一个字典列表。

>>> "foo"['id'] Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: string indices must be integers, not str

否则，您的代码将起作用。

>>> list=[{'id': 3}, {'id': 5}] >>> for i in list: ... print i['id'] ... 3 5

但关于不使用list作为名称的建议仍然存在。

Somewhere in your code, your variable was reassigned a string value, instead of being a list of dictionaries.

>>> "foo"['id'] Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: string indices must be integers, not str

Otherwise, your code would work.

>>> list=[{'id': 3}, {'id': 5}] >>> for i in list: ... print i['id'] ... 3 5

but the advice about not using list as a name still stands.