You can take 2 out of brackets.

I think this is the best practice instead of using map() function that was used above

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.

Hello dinglemouse...I pass all but the zero case. I'm running 0 as in 0 bees...but it fails the test. Any hints for me pls ? tks

I pass all tests except this one: eroAndNull(Tests). What I am supposed to return, because 0 doesn't work. I'm confused. (using java)

nice job dude