Can't get items out of a set?

[Cruxic]

Hello, all.

Is it possible to get an object out of a set() given another object
that has the same hash code and equality (__hash__() and __eq__()
return the same)?

You can't do this with Java Sets either and I've needed it on multiple
occasions.  Doesn't it seem like it would be useful?  Consider:

class Person:
  def __init__(self, id, name):
    self.id = id
    self.name = name

  def __hash__(self):
    return self.id

  def __eq__(self, other):
    return self.id == other.id


people = set( [Person(1, 'Joe'), Person(2, 'Sue')] )
...
p = people.get_equivalent(2)  #method doesn't exist as far as I know
print p.name  #prints Sue


I'm not sure if the above code compiles but I hope you get the idea.
Is it possible?
Much Thanks.
- Cruxic