Python 3.x: Pandas DataFrame How do we combine multiple csv files into one csv file?

Question

I have multiple datasets that has the same number of rows and columns. The column is 0.1,2,3,4,5,6,7,8. For instance, Data1

0.1   3
2   3
3   0.1
4   10
5   5
6   7
7   9
8   2

Data2

0.1   2
2   1
3   0.1
4   0.5
5   4
6   0.3
7   9
8   2

I want to combine the data sets. However, I would like to combine the data by keeping the column and by adding the 2nd columns for multiple files.

0.1   3   2
2   3   1
3   0.1   0.1
4   10   0.5
5   5   4
6   7   0.3
7   9   9
8   2   2

I prefer to use Pandas Dataframe. Any clever way to go about this?