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
STeVe
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