On 06/23/2018 11:02 PM, Chris Angelico wrote:
On Sun, Jun 24, 2018 at 3:44 PM, Jim Lee <jle...@gmail.com> wrote:
On 06/23/2018 10:03 PM, Steven D'Aprano wrote:
I'd like to run a quick survey. There is no right or wrong answer, since
this is about your EXPECTATIONS, not what Python actually does.
Given this function:
def test():
a = 1
b = 2
result = [value for key, value in locals().items()]
return result
what would you expect the result of calling test() to be? Is that the
result you think is most useful? In your opinion, is this a useful
feature, a misfeature, a bug, or "whatever"?
I'm only looking for answers for Python 3. (The results in Python 2 are
genuinely weird :-)
I would *expect* [1, 2, None], though I haven't actually tried running it.
Interesting. Where do you get the None from? Suppose it had been "key
for..." instead of "value", what would the third key have been? ["a",
"b", ...]
ChrisA
There are three locals: a, b, and result. Since result cannot be
assigned a value until the list comp has been evaluated, I would expect
the comp to return a value of "None" for result. An argument could also
be made for [1, 2, []], but one thing I would *not* expect is [1, 2] or
[2, 1]...
-Jim
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