On Tue, 17 Mar 2009 11:23:23 pm hwpuschm@yahoo.de wrote:
What I would like is to extend the augmented assignment and make it easy to understand for naive readers. [...] The following examples would be extensions: "lst = [5,6] + same" synonymous with "lst.reverse(); lst.extend([6,5]); lst.reverse()" "inmutable = same*(same+1)" synonymous with "unused=inmutable+1; inmutable*=unused; del unused"
There seems to be no really simple expression for the above extensions
Instead of the proposed "lst = [5,6] + same" or the obfuscated "lst.reverse(); lst.extend([6,5]); lst.reverse()", what about this simple assignment? lst = [5, 6] + lst Instead of the proposed "inmutable = same*(same+1)" or the obfuscated "unused=inmutable+1; inmutable*=unused; del unused", what about the simple: inmutable = inmutable*(inmutable+1) Since your claimed intention is to make it easy for naive users, why replace the standard idiom: xx += 5 with an assignment containing a mysterious "same"? Many of those naive users will surely assume "same" is a variable name, not a magic keyword, and spend much time looking for where it is assigned. I predict that if your idea goes ahead, we'll get dozens of questions "I can't find where the variable same gets its value from", and we'll have to explain that it is a magic variable that gets its value from the left hand side of the assignment. One last question -- what should happen here? x, y, z = (same, same+1, same+2) -- Steven D'Aprano