Hello all,
As part of a project i'm doing (mostly for the fun of it), I have a
class which creates a sort of wrapper around any object to make it
suitable for use in a custom container. However, if the class
receives an already wrapped object, I want it to just return the
object (same id and everything as the original). Now, the following
seems to work in the __init__ method (due to output), but then it
disappears as soon as the __init__ method is left:
class Node:
...
def __init__(self, cargo=None, prev=None, next=None, nod=False):
"""x.__init__(...) initializes x; see
x.__class__.__doc__ for signature"""
if not isinstance(cargo, Node) or nod:
self.cargo = cargo
self.prev = prev
self.next = next
else:
self = cargo
print id(self), id(cargo)
print self.cargo
>>> a = Node(1)
>>> b = Node(a)
12932600 12932600
1
>>> id(b)
12960632
Any ideas on why this happens, or suggestions as to how to implement
the behavior I'm looking for (in which b and a would refer to the same
object, have the same id, etc.), would be greatly appreciated.
Thanks in advance,
Orri
--
Email: singingxduck AT gmail DOT com
AIM: singingxduck
Programming Python for the fun of it.
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