On Monday 12 February 2024 at 03:21:36 UTC-8 Gareth Ma wrote:
sage: class Number:
....: def __init__(self, x): self.x = x
....: def __repr__(self): return f"Number({self.x})"
....: def _acted_upon_(self, other, _): return Number(self.x *
ZZ(other))
I think that would have horrible side effects. With that code and your
proposed change, I think
"100" * a
should succeed and hence lead to the discovery (and caching!) of an action
of "str" on "Number". I would expect that _acted_upon_ should be pretty
sure of the objects it handles and not rely on generic "try and convert
this" operations.
Another place where Parent may be needed is in the caching code itself:
some of it happens in (partially weak) global dictionaries, but some of it
happens *on the parent*. So `int` would probably fail to have the
appropriate infrastructure for caching.
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