On Sat, Feb 23, 2013 at 2:24 PM, Ezio Melotti firstname.lastname@example.org wrote:
On Sat, Feb 23, 2013 at 5:33 AM, daniel.holth email@example.com wrote:
http://hg.python.org/peps/rev/de69fe61f300 changeset: 4764:de69fe61f300 user: Daniel Holth firstname.lastname@example.org 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  and JQuery  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" . Perl also has a similar-looking operator  (=~) 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 :)