Python从文件导入数据到字典并比较数据

Question

我尝试使用此代码将一些键和值从相对较小的文件导入到字典中

winner = {}
with open ("Scores.txt") as file:
    for line in file:
        (key, val) = line.split()
        winner[key] = val

我的文件包含这样的内容:

Jeff 66
Tom 72
Aaron 34
Eva 47
Aaron 33
Jeff 36
Tom 34
Aaron 67
Tom 76

当我打印字典时，该值被具有相同键的数据覆盖。我想在不更改文件的情况下保留每个玩家的最高分。

这是我想做的事情的伪代码:

If the value in file > value in key:
    replace the value in key with the value in file
Else:
    Do nothing

Answer 1

使用dict.get和max :

winner = {}
with open ("Scores.txt") as file:
    for line in file:
        (key, value) = line.split()
        winner[key] = max(winner.get(key, 0), int(value))
print(winner)
{'Aaron': 67, 'Eva': 47, 'Jeff': 66, 'Tom': 76}

说明:

• winner.get(key, 0) :返回value如果winner已经有key ，否则 0
• max(winner.get(key, 0), int(value)) :比较max对于您的 dict 的每个条目