On Mon, 14 Mar 2005 23:44:46 -0700, Steven Bethard <[EMAIL PROTECTED]> wrote:
>Ron Garret wrote:
>> What I'm really trying to do is to create enumerated types such that if:
>>
>> e1 = enum(lst) and v = e1(x)
>>
>> then
>>
>> (x in lst) and (e1[v] == x)
>
>Use a class with __call__ and __getitem__:
>
>py> class enum(object):
>... def __init__(self, vals):
>... self.vals = vals
>... def __call__(self, val):
>... return self.vals.index(val)
>... def __getitem__(self, index):
>... return self.vals[index]
>...
>py> lst = 'abcd'
>py> x = 'b'
>py> e1 = enum(lst)
>py> v = e1(x)
>py> (x in lst) and (e1[v] == x)
>True
For that, why not just
class enum(list):
def __call__(self, val): return self.index(val)
Regards,
Bengt Richter
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