can any (python) program be written as 1-liner?

Question

Up to now most challenges got at least one answer as 1-liner.
i asked myself, if there is any Challenge that cant be done with one line.

if yes, which attributes does this prog have?

except: interactive programs like eliza...

Answer 1

Not only it DOES but it SHOULD ! Ok more seriously using functional programming you can code anything as a function. Google turing complete and functional programming.

Answer 2

@VcC so the answer is yes for all languages serving l
functional programming.

Answer 3

Even for non functionnal languages google IOCCC for gmorious examples in C