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PEP 572: Python assignment expressions has been accepted

(groups.google.com)
317 points est | 1 comments | 03 Jul 18 08:30 UTC | HN request time: 0s | source
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oooooof ◴[03 Jul 18 09:00 UTC] No.17448560[source]▶
What is it? The link points to a discussion more deep than I’m willing to read.
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kibibu ◴[03 Jul 18 09:06 UTC] No.17448591[source]▶
High-level overview: it's an assignment operator that returns its value, similar to C's assignment operator.

The choice of := is to avoid accidentally using assignment where comparison is expected.

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1. bluecalm ◴[03 Jul 18 20:58 UTC] No.17453569[source]▶
Yeah but there is already solution for that in C: put parenthesis around assignment when using its value as bool. The compilers warn if you don't so making this error in C can only happen if you don't use warnings.