In basic tests cases, add a case for more htan three equal sales values

It's not bad at all: list and dic comprehension with random tests...

Flo, your char class will capture numbers. This is incorrect because numbers are valid chars for variable names. the exercise only specified "-" and "_".
RegExp are particularly difficult, so please pay attention when you use them

Thanks rOg!
I am learning and I am trying to keep the code clean

I like how you spend the rows in each column counting backward from the last open position in each column. Wthout this trick it would be complex to manage the string to place a move. Voted best soultuion.

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not sure of the code...