beautiful

great idea! next time will remmember that solution:)

And why is that?

please use a spoiler flag when discussing code / solutions. I added the flag

if it works, it works.

can't complain.

wuaaouuuuuu

Python doesn't have arrays and the code above isn't creating a list either. It's creating a generator and the creation specifically takes almost no resource, since the values are generated lazily.

AFAIK the difference comes from the code above calling isdigit function a lot of times, whereas replace is only called 10 times. Keep in mind, that both of the functions are highly optimized and written in C, so that's why the the code with more function calls and more python is slower. That also for example causes some O(n^2) algorithms to run faster in python, than an O(n log n) alternative.

This got my head spinning! tried it with other examples and it worked! Haba..

Thats crazy

ahh damm this i didnt thought abt it . intresing approch i like it . but i would want someoen to help me understand this smart one

This is the way.

wha