[Tutor] Dynamic Function Assignment

[John Fouhy]

On 21/10/05, Greg Lindstrom <tubaranger at gmail.com> wrote:
>  Suppose I have three objects...
>
>  a = MyObject(id=1)
>  b = MyObject(id=2)
>  c = MyObject(id=3)
>
>  segment = 'A Segment to Process'
>
>  for id in ('A', 'B', 'C'):
>     if segment.upper().startswith(id):
>        ??how can I select the correct object here with a big "if"
> statement??

Perhaps a dictionary?

Something like:

myObjects = { 'A':MyObject(id=1), 'B':MyObject(id=2), 'C':MyObject(id=3) }
for c in ('A', 'B', 'C'):
  if segment.upper().startswith(c):
    myObjects[c].doSomething(segment)

If your MyObject instances are going to be constructed in a systematic
way, then you could simplify your definition of myObjects a bit more. 
Eg:

objectData = [('A', 1), ('B', 2), ('C', 3)] # etc
myObjects = dict([(c, MyObject(id=id)) for c, id in objectData])

Hope this helps!

--
John.