def func_median(n_num):
    
    #n_num = [1, 2, 3, 4, 5]
    n = len(n_num)
    
    n_num.sort() 
    if n % 2 == 0:
        median1 = n_num[n//2]
        median2 = n_num[n//2 - 1]
        median = (median1 + median2)/2
    else:
        median = n_num[n//2]
    print("Median is: " + str(median))
func_median([10.0,20.0,30.5,40.0])
Median is: 25.25 #working fine

在将其应用于数据集时，会引发错误

new_df_housing['median_income']=new_df_housing['median_income'].apply(func_median)

错误-类型错误：类型为“float”的对象没有len（）

数据集-