reply.vim: No REPL is available for filetype 'python'. Candidates are ['ipython3']

[pinggit]

say for python I want REPL to be ipython3, I've defined this in vimrc

let g:reply_repls = { 'python': ['ipython3'] }

still I got:

reply.vim: No REPL is available for filetype 'python'. Candidates are ['ipython3']

can you advise?

[pfernandez]

Same issue here:

let g:reply_repls = { 'clojure': ['lein repl'] }

"-> reply.vim: No REPL is available for filetype 'clojure'. Candidates are ['lein repl']