[Python-ideas] Short form for keyword arguments and dicts

[Barry Warsaw]

On Jun 22, 2013, at 12:27 PM, Anders Hovmöller wrote:

>Keyword arguments are great for increasing readability and making code more
>robust but in my opinion they are underused compared to the gains they can
>provide. You often end up with code like:
>
>foo(bar=bar, baz=baz, foobaz=foobaz)

The DRY motivation for this proposal reminds me of PEP 292 ($-strings) and
flufl.i18n.  In some of the earlier i18n work I did, the repetition was
overwhelmingly inconvenient.  Generally, it doesn't bother me, but I really
hated doing things like:

    real_name = get_real_name()
    email_address = get_email_address()
    message = _('Hi $real_name <$email_address>').safe_substitute(
        real_name=real_name, email_address=email_address)

not to mention the high probability of typos, and the added noise making the
source harder to read.  flufl.i18n then, shortens this to:

    real_name = get_real_name()
    email_address = get_email_address()
    message = _('Hi $real_name <$email_address>')

The locals and globals are collected into the substitution dictionary, to be
applied after the source string is translated.

Yes, the implementation uses the dreaded sys._getframe(), but it's worth it.

http://tinyurl.com/kqy3hbz
http://tinyurl.com/lalxjaf

Cheers,
-Barry
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