list[] = var => list.append(var) (phpstyle)

[Erno Kuusela]

[reformatted for your reading pleasure]

In article <9iqlgi$kbg9g$1 at ID-11957.news.dfncis.de>, "Emile van
Sebille" <emile at fenx.com> writes:

|| "Alex Martelli" <aleaxit at yahoo.com> wrote in message

|| "Nick Perkins" <nperkins7 at home.com> wrote in message
|| news:LF447.476898$eK2.98947068 at news4.rdc1.on.home.com...

||| I think it should be neet if it would be possible to append a variable
||| to a list by just using
||| list_var[] = var_to_append
||| It works that way in PHP and I think it's nice.
|||
||| Any comments?
   
||    list_var += var_to_append
||
|| (which is how you express this today in Python) is equivalent
|| and shorter.  Python does NOT go out of its way to provide
|| a zillion ways to write the same, identical thing.

| Alex is right as long as var_to_append is already a list.

not quite:

>>> l1 = [1]
>>> l2 = [2]
>>> l1 += l2
>>> l1
[1, 2]

vs.

>>> l2.append(l1)
>>> l2
[2, [1]]

| For non-lists though you can also do

| list_var += 1,

| or,

| list_var += (1,)

hmm, does the sequence protocol really include __add__ing arbitrary
sequences? one would think lists would support it too if that
was the case.

  -- erno