I am not sure what is happening here but I get the same result whether invoking python2 (2.7) or python3 (3.4)
$ python3 keyart -l 0xFE679A908E997AB2
+-----[RSA 4096]----+
| |
| |
| |
| |
| |
| S . |
| . . : |
| ^ ^ ^ i |
| . . l l l .|
| ^.:^? ^ i^|
| . E(? . :^.|
+-[FE679A908E997AB2]+
+-------------------+
| .: |
| . : . . |
| . . ^ ^ ^ |
| ^ . ^ ^ . |
| l ^ ^ ^ |
| . i ^ S |
| . i . ^ |
| l . : . |
| . . ^E^. |
| ^ .^ |
| ^. |
+-------------------+
+-------------------+
| ^il |
| : ^.^ .|
| . : ( .^.|
| ^ l l.^^|
| . ^ :....|
| S . . .E..|
| ...|
| ..|
| . .|
| ^.|
| ..^|
+-------------------+
+-------------------+
| . ... ^^ .. |
| ^ :. . . . |
| E : ^ . . l |
| l . i ^ |
| . ^ . ^ ^ ^ |
| ^ . S i . . |
| . . : : . |
| ^ ^ |
| . . |
| |
| |
+-------------------+