preferred?: multiple assignment

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preferred?: multiple assignment - Skaperen - Dec-03-2016

which would be preferred for assigning x to 6 variables:

a,b,c,d,e,f=x,x,x,x,x

vs.

a=b=c=d=e=f=x

and is there also a preferred style?

RE: preferred?: multiple assignment - micseydel - Dec-03-2016

The latter is definitely more concise and to-the-point. I would go with that unless you want identity to different when equality would still be equal (e.g. a bunch of empty tuples).

RE: preferred?: multiple assignment - nilamo - Dec-05-2016

If they're all the same value, I'd prefer the chaining (second example). But I think the first just shouldn't be used for more than two variables, otherwise it gets difficult to read.

RE: preferred?: multiple assignment - Skaperen - Dec-17-2016

(Dec-03-2016, 03:18 AM)Skaperen Wrote: which would be preferred for assigning x to 6 variables:
a,b,c,d,e,f=x,x,x,x,x
vs.
a=b=c=d=e=f=x
and is there also a preferred style?

i guess no one noticed my typo of only 5 xs in the first code.

RE: preferred?: multiple assignment - micseydel - Dec-17-2016

(Dec-17-2016, 03:28 AM)Skaperen Wrote: i guess no one noticed my typo of only 5 xs in the first code.

All the more reason it shouldn't be preferred :)

RE: preferred?: multiple assignment - Skaperen - Dec-19-2016

(Dec-17-2016, 07:56 AM)micseydel Wrote:
(Dec-17-2016, 03:28 AM)Skaperen Wrote: i guess no one noticed my typo of only 5 xs in the first code.
All the more reason it shouldn't be preferred :)

agreed

RE: preferred?: multiple assignment - Ofnuts - Dec-19-2016

(Dec-19-2016, 08:00 AM)Skaperen Wrote:
(Dec-17-2016, 07:56 AM)micseydel Wrote: All the more reason it shouldn't be preferred :)
agreed

On the contrary... both of these are invalid Python

a,b,c,e,f=x,x,x,x,x
a,b,c,d,e,f=x,x,x,x

So even if a human doesn't notice the problem, Python will. While:

a,b,d,e,f=x

is correct and you'll be told about the unitialized c much later.