Then wouldn't "h" be a valid input? --> "#H". I guess single char is not a "word"

Wow, absolutely did NOT think of using that function. I should read the docs more...

Someone who understood the question and mapped the answer to a programming language precisely. Kudos!

Use spoiler flag next time, your post was visible in the homepage.

I didn't know a word could start with a hashtag I thought just letters

This works but if input starts with '#' this will generate two hashtag. Like generate_hashtag('# test word') will generate '##TestWord'.

i made the whole functions using c++ ;( , tho i only know c++ i think python gives you some edge

It's faster

Way too many unnecessary actions for the code that can be written in one line and more effectively.

Very elegant.

No, because we are checking the length of the initial s variable, not the output variable which always has the length of at least 1 due to the beginning "#" char.