PEP 572: Python assignment expressions has been accepted

Re:PEP 572: Python assignment expressions has been accepted by williamdclt on Tuesday July 03, 2018 @04:20PM (#17453332)

I vastly prefer the second one, as I would expect to see it written something like this:

  tree
    .map(node => node.find(SOME_XPATH))
    .filter(Boolean)
    .map(node => node.get("value"))

I don't use Python on a daily basis, but I find that infinitely more readable than the comprehension version (plus, it's a syntax used in several major languages)

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Re:PEP 572: Python assignment expressions has been accepted by lukeschlather on Tuesday July 03, 2018 @05:40PM (#17453797)

In fairness, the Python also should be broken up. It should be:

    [
      found_node.get("value") 
      for node in tree 
      if (found_node := node.find(SOME_XPATH)) is not None
    ]

I think I also prefer Ruby/Javascript style comprehensions, but it's worth comparing well formatted code.

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