Python 将嵌套在两个字典下的列表转换为DataFrame
我试图用Python创建一个包含嵌套字典和列表的Pandas数据框架。我查看了有关转换嵌套字典的其他问题,但找不到充分的答案 我有一本字典,比如说,它是一本活动手册,记录着学校的课外课程。在本例中,有两个课程,每个课程都是嵌套在活动手册词典下的自己的词典。每本课程词典都包含一份由每个人编写的活动列表,并按月组织。每个月进行活动的学生人数是可变的,但结构始终是学生活动分钟数。例如:Python 将嵌套在两个字典下的列表转换为DataFrame,python,python-3.x,dictionary,pandas,Python,Python 3.x,Dictionary,Pandas,我试图用Python创建一个包含嵌套字典和列表的Pandas数据框架。我查看了有关转换嵌套字典的其他问题,但找不到充分的答案 我有一本字典,比如说,它是一本活动手册,记录着学校的课外课程。在本例中,有两个课程,每个课程都是嵌套在活动手册词典下的自己的词典。每本课程词典都包含一份由每个人编写的活动列表,并按月组织。每个月进行活动的学生人数是可变的,但结构始终是学生活动分钟数。例如: activity_dict = { 'lesson1' : { 'january' : [['Todd', 'R
activity_dict = {
'lesson1' : { 'january' : [['Todd', 'Running', 30],['Christy', 'Studying', 25],['Alex','Soccer', 10]],
'february' : [['Jim', 'Bobsledding', 5],['Frank', 'Jogging',8]]},
'lesson2' : {'february' : [['Todd', 'Running', 18],['John', 'Studying', 3],['Don','Soccer', 40]],
'march' : [['Tom', 'Bobsledding', 10],['Sam', 'Yoga', 42]],
'april' : [['Julie', 'Biking', 20],['Chris', 'Baseball', 10]]}
}
我试图得到每个学生活动的输出,ColA=Lesson#,ColB=Month,ColC=student,ColD=activity,ColE=Minutes。样本输出为:
Lesson # Month Student Activity Minutes
Lesson 1 February Jim Bobsledding 5
Lesson 1 February Frank Jogging 8
Lesson 2 February Todd Running 18
我已经找到了一种方法来创建从C列到E列的数据帧,但是我无法包括a列和B列
我现在的代码如下:
import pandas
activity_log = []
for lesson, all_activities in activity_dict.items():
for month, month_activities in all_activities.items():
activity_log.append(pandas.DataFrame(month_activities))
我如何更新它以将字典键(lesson和month)包含为列A和列B?我不确定将列表列表更改为字典是否有帮助,但我将其保留为列表,因为这就是我接收数据的方式。使用a将列表列表的dict of dict转换为列表列表:
In [99]: [(lesson, month, name, activity, minutes)
for lesson, dct in activity_dict.items()
for month, vals in dct.items()
for name, activity, minutes in vals]
Out[99]:
[('lesson2', 'april', 'Julie', 'Biking', 20),
('lesson2', 'april', 'Chris', 'Baseball', 10),
('lesson2', 'february', 'Todd', 'Running', 18),
('lesson2', 'february', 'John', 'Studying', 3),
('lesson2', 'february', 'Don', 'Soccer', 40),
('lesson2', 'march', 'Tom', 'Bobsledding', 10),
('lesson2', 'march', 'Sam', 'Yoga', 42),
('lesson1', 'january', 'Todd', 'Running', 30),
('lesson1', 'january', 'Christy', 'Studying', 25),
('lesson1', 'january', 'Alex', 'Soccer', 10),
('lesson1', 'february', 'Jim', 'Bobsledding', 5),
('lesson1', 'february', 'Frank', 'Jogging', 8)]
In [98]: pd.DataFrame([(lesson, month, name, activity, minutes)
for lesson, dct in activity_dict.items()
for month, vals in dct.items()
for name, activity, minutes in vals],
columns=['Lesson', 'Month', 'Name', 'Activity', 'Minutes'])
Out[98]:
Lesson Month Name Activity Minutes
0 lesson2 april Julie Biking 20
1 lesson2 april Chris Baseball 10
2 lesson2 february Todd Running 18
3 lesson2 february John Studying 3
4 lesson2 february Don Soccer 40
5 lesson2 march Tom Bobsledding 10
6 lesson2 march Sam Yoga 42
7 lesson1 january Todd Running 30
8 lesson1 january Christy Studying 25
9 lesson1 january Alex Soccer 10
10 lesson1 february Jim Bobsledding 5
11 lesson1 february Frank Jogging 8
然后使用pd.DataFrame
从列表中构建数据帧:
In [99]: [(lesson, month, name, activity, minutes)
for lesson, dct in activity_dict.items()
for month, vals in dct.items()
for name, activity, minutes in vals]
Out[99]:
[('lesson2', 'april', 'Julie', 'Biking', 20),
('lesson2', 'april', 'Chris', 'Baseball', 10),
('lesson2', 'february', 'Todd', 'Running', 18),
('lesson2', 'february', 'John', 'Studying', 3),
('lesson2', 'february', 'Don', 'Soccer', 40),
('lesson2', 'march', 'Tom', 'Bobsledding', 10),
('lesson2', 'march', 'Sam', 'Yoga', 42),
('lesson1', 'january', 'Todd', 'Running', 30),
('lesson1', 'january', 'Christy', 'Studying', 25),
('lesson1', 'january', 'Alex', 'Soccer', 10),
('lesson1', 'february', 'Jim', 'Bobsledding', 5),
('lesson1', 'february', 'Frank', 'Jogging', 8)]
In [98]: pd.DataFrame([(lesson, month, name, activity, minutes)
for lesson, dct in activity_dict.items()
for month, vals in dct.items()
for name, activity, minutes in vals],
columns=['Lesson', 'Month', 'Name', 'Activity', 'Minutes'])
Out[98]:
Lesson Month Name Activity Minutes
0 lesson2 april Julie Biking 20
1 lesson2 april Chris Baseball 10
2 lesson2 february Todd Running 18
3 lesson2 february John Studying 3
4 lesson2 february Don Soccer 40
5 lesson2 march Tom Bobsledding 10
6 lesson2 march Sam Yoga 42
7 lesson1 january Todd Running 30
8 lesson1 january Christy Studying 25
9 lesson1 january Alex Soccer 10
10 lesson1 february Jim Bobsledding 5
11 lesson1 february Frank Jogging 8
杰出的现在尝试一下,会尽快回复!这管用!快速提问,为什么作为pd进口大熊猫如此普遍?仅仅是因为pd更方便吗?我认为它有两个优点:它节省了输入(如果你引用了很多函数或类)并且使代码更可读。