如何在python的任何数据结构中检查NaN？

import math

def check_nan(data):
    if isinstance(data, float) and math.isnan(data):
        print("The value is NaN")
    elif isinstance(data, list) or isinstance(data, tuple):
        for item in data:
            check_nan(item)
    elif isinstance(data, dict):
        for key, value in data.items():
            check_nan(key)
            check_nan(value)

# 示例数据
data = [1, 2, float('nan'), {'a': float('nan'), 'b': 3.14}]

# 检查NaN
check_nan(data)