Stephane: Let me rephrase it: if x in list is not the thing that people complain not being a built-in function. They complain about the fact that there is not explicit way to find the first occurrence of something in a list that matches a certain condition. But as stated in my answer, next() can be (ab)used for that.
https://stackoverflow.com/questions/9542738/find-a-value-in-a-list



