[Python-Dev] [Python-checkins] peps: PEP 426: replace implied 'version starts with' with new ~= operator (original) (raw)

Nick Coghlan ncoghlan at gmail.com
Sat Feb 23 12:06:00 CET 2013

On Sat, Feb 23, 2013 at 2:24 PM, Ezio Melotti <ezio.melotti at gmail.com> wrote:

Hi,

On Sat, Feb 23, 2013 at 5:33 AM, daniel.holth <python-checkins at python.org> wrote: http://hg.python.org/peps/rev/de69fe61f300 changeset: 4764:de69fe61f300 user: Daniel Holth <dholth at fastmail.fm> date: Fri Feb 22 22:33:09 2013 -0500 summary: PEP 426: replace implied 'version starts with' with new ~= operator

I haven't seen any discussion about this, but FWIW CSS [0] and JQuery [1] use ^= for this purpose. ^ also indicates the beginning of the string in regular expressions (this is why ^= was chosen for CSS/JQuery). They also use ~= to indicate "attribute contains word" [0][2]. Perl also has a similar-looking operator [3] (=~) used to test a regex match.

Daniel is a fan of this syntax, but I think it is inferior to the implied approach, so don't expect it to survive to any accepted version of the PEP :)

Cheers, Nick.

-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia

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