So I have two dataframes, in pandas:
x = pd.DataFrame([[1,2],[3,4]])
>>> x
   0  1
0  1  2
1  3  4
y = pd.DataFrame([[7,8],[5,6]])
>>> y
   0  1
0  7  8
1  5  6
Clearly they are the same size. Now it seems you can do merges and joins on a selected column, but I can't seem to do it on an index. I want the outcome to be as:
   0  1  2  3
0  7  8  1  2
1  5  6  3  4
 
    