如何在python嵌套列表中对数据进行分类
我需要将python嵌套列表分类如下如何在python嵌套列表中对数据进行分类,python,list,Python,List,我需要将python嵌套列表分类如下 [ ['amal', 20], ['kamal', 25], ['amal', 30] ] 答案应该是, [amal,20,30] [kamal,25] 您可以使用根据第一个值对子列表进行分组: from itertools import groupby from operator import itemgetter as g [[k, *(i[1] for i in v)] for k,v in groupby(sorted(l, key=g(0))
[
['amal', 20],
['kamal', 25],
['amal', 30]
]
答案应该是,
[amal,20,30]
[kamal,25]
您可以使用根据第一个值对子列表进行分组:
from itertools import groupby
from operator import itemgetter as g
[[k, *(i[1] for i in v)] for k,v in groupby(sorted(l, key=g(0)), g(0))]
# [['amal', 20, 30], ['kamal', 25]]
另一种方法是在数据帧上使用groupby:
将熊猫作为pd导入
数据=[
[amal',20],
[kamal',25],
[amal',30]
]
df=pd.DataFrame(数据,列=['key','value'])
grouped=data.groupby('key').agg(列表)
打印(分组的.head())
这是另一种方法
list1 = [
['amal', 20],
['kamal', 25],
['amal', 30]
]
ls2=[]
k = set([i[0] for i in list1])
for i in k:
k2 = [ j[1] for j in list1 if j[0]==i]
k2.insert(0,i)
ls2.append(k2)
ls2
# Output: [['kamal', 25], ['amal', 20, 30]]
有趣!但是你的密码在哪里?你在跟谁说话?