问题

我有一个名为teams[]的数组，我从一个csv文件中填充了数据（csv文件包含团队和得分）：

```python
teams = []
with open("2018m.csv", "r") as file:
    reader = csv.DictReader(file)

    for row in reader:
        row["rating"] = int(row["rating"])
        teams.append(row)

然后我有一个名为counts{}的字典，我想要通过模拟来统计每支球队赢得冠军的次数。问题是，我想要将teams[]中的所有球队添加到counts{}中，然后给它们一个值0（因为起初没有任何冠军），所以它会看起来像这样：

counts = {
"Brasil": 0,
"Argentina": 0,
"France": 0
}

我需要知道如何仅获取来自teams[]的团队行，并同时将其值设置为0。我想通过循环来实现这个，添加teams[i]，但我不知道如何仅获取团队行，也不知道如何给它赋值。

帮助，已经卡住一段时间了！

我想象中的代码是：

counts[teams[i]] = 0

但我知道这是不可能的。

<details>
<summary>英文:</summary>

I have an array called teams[] which I filled with data from a csv file (the csv has a team and a score):

teams = []
with open("2018m.csv", "r") as file:
reader = csv.DictReader(file)

    for row in reader:
        row["rating"] = int(row["rating"])
        teams.append(row)

But then I have a dictionary called counts{} where I want to count how many times a team won the championship by a simulation. The thing is that I want to add all the teams from teams[] and then give them a value 0 (cause at first nobody will have any championship) so it will look kind of like this

counts {
"Brasil": 0,
"Argentina": 0,
"France": 0
}

I need to know how to get only the team row from teams[] and at the same time add it a value of 0. I tought to this with a loop and add teams[i] but I don't know how to just take the team row and also how to give it the value.

HELP BEEN STUCK FOR A WHILE!!

I imagine something like:

counts[teams[i]] = 0

but i Know it is not possible

</details>


# 答案1
**得分**: 0

使用字典推导式：

```python
counts = {team['team']: 0 for team in teams}

counts = {team['team'] : 0 for team in teams}