How to Find the Key with the Maximum Value in a Python Dictionary?

Finding the Key with Maximum Value in a Dictionary

Consider a dictionary with string keys and integer values, such as the following:

stats = {'a': 1, 'b': 3000, 'c': 0}

Determining the key with the maximum value may arise as a common requirement. While an "intermediate list with reversed key-value tuples" approach as suggested can work, alternative solutions may offer a more elegant and efficient solution.

One such approach utilizes the max() function with a custom key function. Here's how it works:

max(stats, key=stats.get)

In this code:

• max(stats) finds the maximum value from the values of the dictionary.
• key=stats.get specifies a custom key function. For each key-value pair in the dictionary, stats.get(key) returns the corresponding value.

By specifying this key function, we effectively instruct max() to compare values rather than keys. This allows us to determine the key with the maximum value:

>>> max(stats, key=stats.get)
'b'

In this example, the key 'b' holds the maximum value of 3000. This method provides a concise and efficient way to retrieve the key with the largest value from a dictionary.

The above is the detailed content of How to Find the Key with the Maximum Value in a Python Dictionary?. For more information, please follow other related articles on the PHP Chinese website!