从具有"nan“值的字典中删除键

import math

def remove_nan_values(dictionary):
    keys_to_remove = []
    for key, value in dictionary.items():
        if isinstance(value, float) and math.isnan(value):
            keys_to_remove.append(key)
    for key in keys_to_remove:
        del dictionary[key]

# 示例用法
my_dict = {"key1": 10, "key2": float('nan'), "key3": "value3", "key4": float('nan')}
remove_nan_values(my_dict)
print(my_dict)

{"key1": 10, "key3": "value3"}