walrus with a twist :+= or ...
avigross at verizon.net
Wed Oct 27 20:56:59 EDT 2021
I realized that the person seeking completeness in Python may next ask why
the Walrus operator, :=, is not properly extended to include a whole
assortment of allowed assignment operators
I mean in normal python programs you are allowed to abbreviate
x = x + 5
x += 5
Similarly you have other operators like
x *= 2
And, of course, the constantly used operator:
x %= 2
So how does one extend a walrus operator if they ever decide to give in and
add it to the language just for completeness?
Sadly, a simple test shows they neglected to use a :+= operator in the
>>> (walrus := 2)
>>> (wallrus :+= 2)
File "<stdin>", line 1
(wallrus :+= 2)
SyntaxError: invalid syntax
(Yes, I know how to spell walrus, but making a point.)
On a serious note, if it was ever considered a good idea, what would be an
acceptable sequence of symbols that might not break or confuse existing
programs and what would we call it? I mean what animal, of course.
What do these look like in some fonts? :+= :-= :*= :/= :%=
Or do we not just add a colon in front and make it a tad different as in :=+
or :+=: or maybe realize the futility of perfection! After all, you can
easily use some functions to get a result such as:
x := func(x, "+", 5)
x := func_add(x, 5)
or many other work-arounds.
Can we all forget I asked? I am sort of being sarcastic.
More information about the Python-list