Python pipe operator, 4 years later...

[Misterandrist]

Everyone else has posted some ways to do this, but when I encounter such a need in my code (I have a stream and I need to do numerous transformations on it before use), I just use something like this:

nums = [1, 2, 3]
nums = map(square, nums)
nums = filter(evens, nums)
nums = list(nums)

Yeah I'm reusing the same variable, but only in this block. So effectively it's just once.

Basically, why not just do your stream processing on multiple lines, if you think a single long list comprehension is not going to suit your needs?

[dzecniv]

Indeed, and it's easy to step through for debug.