use uptick (python3)
$ pip3 install uptick
$ uptick randowif
+-----------------------------------------------------+-------------------------------------------------------+
| wif | pubkey |
+-----------------------------------------------------+-------------------------------------------------------+
| 5KDqbU7ejd4GNPGXLESK8f5xdqidiZLEzimA5NNg9JaLfHnTuQS | BTS74HZ79sxm2JpQcuCKtM59cWGVVyFqTeX4dc4PgE2FboV3ZdgFn |
+-----------------------------------------------------+-------------------------------------------------------+