Tony wrote:
> On Aug 8, 9:28 pm, Peter Otten <[EMAIL PROTECTED]> wrote:
>
>> No, just wrong.
>>
>> >> class A:
>>
>> ... def alpha(self): return dir(self)[-2]
>> ... def gamma(self): return dir(self)[-1]
>> ...>>> a = A()
>> >>> a.alpha(), a.gamma()
>> ('alpha', 'gamma')
>> >>> a.beta = 42
>> >>> a.alpha(), a.gamma()
>>
>> ('beta', 'gamma')
>>
>> Peter
> Only wrong if the function is only to write its own name. if it does
> something else as well, seems to work:
>
> class a:
>
> def square(self, x):
> print 'executing:', dir(self)[-1]
> print x*x
> def cube(self, x):
> print 'executing:', dir(self)[-2]
> print x*x*x
>
> b=a()
>
> b.cube(4),b.square(2)
> b.c =4
> b.cube(3), b.cube(2)
You mean
b.cube(3), b.square(2)
> executing: cube
> 64
> executing: square
> 4
> executing: cube
> 27
> executing: cube
> 8
Yeah, cargo cult programming, I love it.
dir() sorts attribute names alphabetically. Therefore the tail of the list
you are accessing will only be altered if you choose a name >
min(other_names), i. e. a name that comes after "cube" in the alphabet. Try
setting
b.root = 42
if you don't believe me.
Peter
--
http://mail.python.org/mailman/listinfo/python-list
