Dictionary attributes and functions

[Carel Fellinger]

iddwb <iddwb at imap1.asu.edu> wrote:
...
> attributes that can be reference regarding dictionaries... specifically if
> key(a) is already in dictionsary x I'd like to know prior to
> adding.  rather than change the value of key(a) I'd like to add the value
> of key(`a) to the value of key(a) so I end up with

> {keya: [123]}
> on insert of keya againg have something like
> {keya: [123, 234]}

in python 2.0 (or was this already in 1.6?) and newer:

   d = dict.setdefault(key, [])
   d.append(value)

in older versions still around:

   if dict.has_key(key):
	dict[key].append(value)
   else:
      dict[key] = [value]
-- 
groetjes, carel