Append data to column in pan

In [35]:

df1 = pd.DataFrame.from_items([('A', [1, 2, 3]), ('B', [4, 5, 6])])
df2 = pd.DataFrame.from_items([('B', [5, 6, 7]), ('A', [8, 9, 10])])
df3 = pd.DataFrame.from_items([('C', [5, 6, 7]), ('D', [8, 9, 10]), ('A',[1,2,3]), ('B',[4,5,7])])
df_list = [df1,df2,df3[['A','B']]]
pd.concat(df_list, ignore_index=True)
Out[35]:
    A  B
0   1  4
1   2  5
2   3  6
3   8  5
4   9  6
5  10  7
6   1  4
7   2  5
8   3  7

Source: stackoverflow.com

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