On 1/28/2019 11:14 AM, Roberto Martínez wrote:
Hi,
the documentation about Special method lookup
<https://docs.python.org/3/reference/datamodel.html#special-method-lookup>
claims:
"For custom classes, implicit invocations of special methods are only
guaranteed to work correctly if defined on an object’s type, not in the
object’s instance dictionary. "
Does this statement holds for every special method mentioned in section 3.3
Special method names
<https://docs.python.org/3/reference/datamodel.html#special-method-names>?
You should generally take such statements at face value. Unless you
find specific exceptions mentioned elsewhere, 'no guarantee' means just
that, regardless of how any particular implementation behaves today.
--
Terry Jan Reedy
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