On Sat, Feb 23, 2013 at 5:33 AM, daniel.holth firstname.lastname@example.org wrote:
http://hg.python.org/peps/rev/de69fe61f300 changeset: 4764:de69fe61f300 user: Daniel Holth email@example.com 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.
Best Regards, Ezio Melotti
: http://www.w3.org/TR/selectors/#selectors : http://api.jquery.com/attribute-starts-with-selector/ : http://api.jquery.com/attribute-contains-word-selector/ : http://perldoc.perl.org/perlop.html#Binding-Operators