如何按常见项目对元组进行分组并找到每组的平均值

问题描述

我有一个名为 data 的元组列表:

I have a list of tuples named data:

data = [('A', 2), 
        ('B', 2), ('B', 4), ('B', 6), ('B', 8), ('B', 6), ('B', 4), ('B', 3),
        ('C', 10), ('C', 10), ('C', 10),
        ('D', 12),
        ('E', 12),
        ('F', 10), ('F', 8), ('F', 6)]
average = []

我想要每个相同字母的平均值:

I would like an average of the values for each same letter:

预期输出:

average = [('A', 2), ('B', 5), ('C', 10), ('D', 12), ('E', 12), ('F', 8)]

推荐答案

试试 groupby

from itertools import groupby
data_ = [(n,[i[1] for i in g]) for n,g in groupby(data, key = lambda x:x[0])]   
result = [(i,float(sum(j))/float(len(j))) for i,j in data_]

结果

[('A', 2.0),
 ('B', 4.714285714285714),
 ('C', 10.0),
 ('D', 12.0),
 ('E', 12.0),
 ('F', 8.0)]

这篇关于如何按常见项目对元组进行分组并找到每组的平均值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！