List comprehensions splitting loop variable

I am trying to find out if there is a way to split the value of each iteration of a list comprehension only once but use it twice in the output. As an example of the problem I am trying to solve is, I have the string: ``` a = "1;2;4\n3;4;5" ``` And I would like to perform this: ``` >>> [(x.split(";")[1],x.split(";")[2]) for x in a.split("\n") if x.split(",")[1] != 5] [('2', '4'), ('4', '5')] ``` Without the need for running split three times. So something like this (Which is obviously invalid syntax but hopefully is enough to get the message across): ``` [(x[1],x[2]) for x.split(";") in a.split("\n") if x[1] != 5] ``` In this question I am not looking for fancy ways to get the 2nd and 3rd column of the string. It is just a way of providing a concrete example. I could for course for the example use: ``` [x.split(";")[1:3] for x in a.split("\n")] ``` The possible solutions I have thought of: - Not use a list comprehension - Leave it as is - Use the `csv.DictReader`, name my columns and something like `StringIO` to give it the input. This is mostly something that would be a nice pattern to be able to use rather than a specific case so its hard to answer the "why do you want to do this" or "what is this for" kind of questions Update: After being reading the solution below I went and ran some speed tests. And I found in my very basic tests that the solution provided was 35% faster than the naive solution above.