list of functions question

[Tim Roberts]

val bykoski <val at vtek.com> wrote:
>
>Hi The List:
>   I have a modeling app where i'm detecting events (in temporal 
>dynamics) applying a set of (boolean) functions - kind of:
>
>event_list = "f1 f2 etc".split()  # each fi detects a specific event
>i have defs for functions fi, or simple boolean expressions for each, so 
>that evList is a list of defs or boolean expressions
>for ev in evList:
>    if ev:	# this supposedly is a call ev(t)
>       # doing smth with the event
>
>    I didn't succeed, though, (blindly) trying various options.
>I thought/tried "apply()" but couldn't get it work.
>I'd appreciate pointers to how to handle this kind of
>functions or events lists (or objects?) and how to call those
>functions in a loop.

If you hadn't tried the string shortcut, it would have worked:

  event_list = [f1, f2, etc]

As it is, event_list is a list of strings, not a list of functions.

Then, when you want to call it, remember that it has to be treated like a
function:

  for ev in event_list:
    if ev(t):
      pass

If you REALLY need the list of functions to come from a string, you can
also do:

  event_list = [eval(f) for f in "f1 f2 etc".split()]
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.