Is the ladder on the left side?
Yes, the ladder is on the left of the image.
    src        edge_attr  dst
0     0  to the right of    7
1     0  to the right of    6
2     0   to the left of    9
3     0  to the right of    5
4     0   to the left of    4
..  ...              ...  ...
62   14               on   13
63   14  to the right of    9
64   14   to the left of   15
65   15  to the right of   13
66   15  to the right of   14

[67 rows x 3 columns]