Hi Bob,
Sorry for the late reply, but thank you for your code. I still haven't
completely wrappped my brain around decorator functions, but thanks to your
reply at least now my frontal lobe is touching it. ;-)
Re: the ordering of functions: I thought it mattered because the inspect module
returns a list of two-tuples (in this case, a list of four two-tuples).
Therefore, e.g. option #1 should always cause the same function to be run. But
apparently I'm wrong here somewhere.
Best wishes,
Albert-Jan
Netherlands
--- On Thu, 8/6/09, bob gailer <bgai...@gmail.com> wrote:
> From: bob gailer <bgai...@gmail.com>
> Subject: Re: [Tutor] easy way to populate a dict with functions
> To: "Albert-Jan Roskam" <fo...@yahoo.com>
> Cc: "tutorpythonmailinglist Python" <tutor@python.org>
> Date: Thursday, August 6, 2009, 10:20 PM
> Albert-Jan Roskam wrote:
> > Hi Bob,
> >
> > Very neat solution, thanks a lot! I didn't know the
> inspect module, but it's just what's needed here. Cool!
>
> Great.
>
> Regarding the ordering of functions in the list - variable
> names in namespaces (such as modules) are stored in
> dictionaries. Any ordering is lost in this process. Why is
> order important to you here?
>
> There are other things that could be said about your
> program and my revision.
>
> 1 - it is better to have functions return values and have
> the main program decide whether to print them or take some
> other action. (Also note you were not consistent - foo
> returns the others print!)
>
> 2 - since the list contains the function names as well as
> references to the functions you could present the names to
> the user. You could even ask the user to enter the first
> letter(s) of the names instead of a number.
>
> 3 - with a slight enhancement to things you can preserve
> the order:
>
> # -------- commands.py ---------------
> cmds = []
> def collect(func):
> 'a "decorator" that adds each function to the cmds list'
> cmds.append((func.__name__, func))
>
> @collect
> def foo (a):
> return "foo" * a
>
> @collect
> def bletch (q):
> for i in range(20):
> return i * q
>
> @collect
> def stilton (n):
> return "yes sir, " * n
>
> @collect
> def romans (z):
> return "what have the romans really done for us?\n" * z
>
> # -------- end code ---------------
>
> # -------- main.py ---------------
> import commands
> cmds = commands.cmds
>
> # etc.
>
> -- Bob Gailer
> Chapel Hill NC
> 919-636-4239
>
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