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pythonlistlist-comprehensionas-keyword

"As" keyword in list comprehensions

Is there something similar to a as keyword in list comprehensions?

Example: instead of

L = [foo(bar(baz(bla(x)))) for x in X if foo(bar(baz(bla(x)))) == 1]

it would be:

L = [foo(bar(baz(bla(x)))) as y for x in X if y == 1]
Solution

  • In python 3.8 you can use walrus operator to do this:

    >>> L = [y for x in X if (y := foo(bar(baz(bla(x))))) == 1]