[Python-ideas] Unpack of sequences

Alexander Belopolsky alexander.belopolsky at gmail.com
Wed Aug 29 23:19:11 CEST 2012

On Wed, Aug 29, 2012 at 4:45 PM, Guido van Rossum <guido at python.org> wrote:
> But {a, b, c} doesn't look like a dict.

locals().update(m) does not look like a dict either, but many people
expect it to work and get bitten when it does not.

> Please give it up.

Do you ask to give up the {a, b, c} = idea or any ideas that import
mappings into local variables?  For example some abuse of the with
statement would allow

with m in a, b, c:
    # a, b, and c are local here

I am not really proposing this, just giving an example for the range
of possibilities.  I am sure an acceptable syntax can be found if DRY
is considered important enough, but if any automation of

a = m['a']
b = m['b']
c = m['c']

is deemed to be an anti-pattern, then this thread is better to stop.

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