On 12/30/22 15:47, Paul Bryan wrote:
What kind of elements are being added to the set? Can you show
reproducible sample code?
The objects in question are DHCP leases. I consider them "equal" if
the lease address (or IPv6 prefix) is equal, even if the timestamps have
changed. That code is not small, but it's easy to demonstrate the
behavior.
>>> import datetime
>>> class Foo(object):
... def __init__(self, index):
... self.index = index
... self.timestamp = datetime.datetime.now()
... def __eq__(self, other):
... return type(other) is Foo and other.index == self.index
... def __hash__(self):
... return hash(self.index)
... def __repr__(self):
... return f'Foo({self.index}) created at {str(self.timestamp)}'
...
>>> f1 = Foo(1)
>>> s = { f1 }
>>> s
{Foo(1) created at 2022-12-30 16:24:12.352908}
>>> f2 = Foo(1)
>>> f2
Foo(1) created at 2022-12-30 16:24:35.489208
>>> s.add(f2)
>>> s
{Foo(1) created at 2022-12-30 16:24:12.352908}
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