Python-合并数据框名称包含在列表中

Question

我有2个数据帧（现在我说2个，但我们可以有n个数据帧）。数据框的名称在列表中。我想加入名称出现在列表中的所有数据框

import pandas as pd
data1 = [['Alex',10],['Bob',12],['Clarke',13]]
df1 = pd.DataFrame(data1,columns=['Name','Age'])

data2 = [['David',10],['Alain',12],['Rob',13]]
df2 = pd.DataFrame(data2,columns=['Name','Age'])

list = ['df1','df2']                   

# i want something to work like

df3 = pd.Concat(list)

感谢您的帮助。

Answer 1

您需要将名称设置为索引，然后执行<script> function moreButton() { $('.more').click(function(){ var id=$(this).data("id"); $.ajax({ url:"more.php", data:{id:id}, method:"post", success:function(data){ if(data!=''){ $('#load_data_table').append(data); $('#remove_row').remove(); moreButton(); } else{ $('.more:last').html("No Data"); } } }); } $(document).ready(function(){ moreButton(); });

concat

或使用list = [df1,df2] pd.concat([x.set_index('Name') for x in list],axis=1) Out[270]: Age Age Alain NaN 12.0 Alex 10.0 NaN Bob 12.0 NaN Clarke 13.0 NaN David NaN 10.0 Rob NaN 13.0 + reduce

merge

Answer 2

如果您想concat，则使用以下结果：

pd.concat([df1, df2], ignore_index=True)

#     Name  Age
#0    Alex   10
#1     Bob   12
#2  Clarke   13
#3   David   10
#4   Alain   12
#5     Rob   13

Answer 3

请勿将变量名用作list。遍历列表以获取数据帧的实例，然后进行串联

lis = ['df1','df2']                   

df3 = pd.concat([globals()[i] for i in lis]) # to get instance of df1 from string 'df1'
df3

输出

Name    Age
Alex    10
Bob     12
Clarke  13
David   10
Alain   12
Rob     13