That is the solution in essence, but it is hard to read, not to mention that debugging is almost impossible as is.
Python is a very verbose and explicit language. We shouldn't neglect that in favor of shorter code, I think.

not an issue

It is confusing for new warriors.

Thank you!

Hi I am getting the same frustrating error that the 'server is timing out'. I have tried refactoring the code, any pointers as to how i can refactor? or what I need to be aiming for, shooting in the dark with this one.

I like this, it's clever and crazy simple but could be reduced to 'return n in set('0123456789')'. Kudos and good luck!

Yep, they are indeed much larger and much more numerous.

I keep getting that today too ... looking at some of the other postings here, I get the idea it's a timeout due to the submit test cases being much larger numbers than the test test cases. Next step, more optimization. :-)

That goes outside my control; try to resubmit in a short while and it might work :)

All my tests passed but I get the following when I submit:

Server Execution Error:
The server attempted to execute your code but there was an issue with the request. This should be a rare issue. Please try running your code again. If the issue persists, please contact us.

You are attempting to solve the problem with a brute-force approach, which will never work as you will time out.

As you could have read in other comments below, you should find another approach.