[Tutor] parsing chemical formula

[Christian Tismer]

Sorry, tutor list,
but I could not resist.
I will stop this now. (Ahem)

Martijn Faassen wrote:
> 
> Christian Tismer wrote:
> 
> > Now, if you must, how 'bout this:

[second try. But watch out...]

> Hm, this is too many lines [whine, nag, never-pleased-ly yours]. As
> kludge trickery though, it's way cool!
> 
> > I think I have to duck and cover if Timbot watches me :-)
> 
> Indeed, Timbot is sure to catch us at this soon!

Now I will him give a final reason to pursue me.

def enum(func):
    g = globals() ; code = func.func_code
    base = apply(func, (0,)*code.co_argcount) or 0
    for i in range(code.co_argcount):
        g[code.co_varnames[i]] = i+base

Yeees, this is hefty.
But now watch out what I got for the application:

from spinners.pirx import enum    # har har

enum(lambda ONE, TWO, THREE, FOUR, FIVE:1)

# this gives us an enumeration, based from 1. Believe me.

>>> ONE, TWO, THREE, FOUR, FIVE
(1, 2, 3, 4, 5)

Naaah? Oh yeah, now we really have a "useful" lambda example :-)))

ciao - chris.ducked.and.covered.for.the.rest.of....

-- 
Christian Tismer             :^)   <mailto:tismer@appliedbiometrics.com>
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