On 4 Mai, 10:23, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote: > > > It is not possible to index set objects. That is OK. > > > But, what if I want to find some element from the Set. > > In the particular case, I have to read an attribute from any one of > the elements, which one doesn't matter because this attribute value is > same across all elements in the set.
Just to clarify: do you want to just get an *arbitrary* element from the set or do you want to find a *specific* element in the set? In the first case you have to convert it to a list (as pointed out earlier in this thread): >>> s = set(range(10)) >>> list(s)[0] 0 In the second case, just use th "in" operator: >>> 10 in s False >>> 5 in s True Since you have to have a reference to the object for whose membership you are testing, you can just use this object. Stupid example: >>> class Point: ... def __init__(self, x, y): ... self.x = x ... self.y = y ... >>> l = [Point(n,n+2) for n in range(10)] >>> s = set(l) >>> Point(0,2) in s False >>> l[0] in s True >>> >>> l[0].x,l[0].y (0, 2) Chris -- http://mail.python.org/mailman/listinfo/python-list
