[Python-ideas] Adding "+" and "+=" operators to dict

[Stephen J. Turnbull]

Chris Barker - NOAA Federal writes:

 > > avoids any confusion over operators and having += duplicating the
 > > update method.
 > 
 > += duplicates the extend method on lists.
 > 
 > And it's really redundant for numbers, too:
 > 
 > x += y
 > 
 > x = x + y
 > 
 > So plenty of precedent.

Except for the historical detail that Guido dislikes them!  (Or did.)
For a long time he resisted the extended assignment operators,
insisting that

    x += 1

is best spelled

    x = x + 1

I forget whether he ever said "if you're worried about inefficiency of
temp creation, figure out how to optimize the latter".