Is there a __dunder__ method corresponding to |= (pipe equal/update) for dicts in python 3.9?

Question

In python 3.9, dictionaries gained combine | and update |= operators. Is there a dunder/magic method which will enable this to be used for other cl

Answer 1

Yes, the method for | is __or__ and the method for |= is __ior__. You can see an (approximate) Python implementation here in PEP 584.

def __or__(self, other):
    if not isinstance(other, dict):
        return NotImplemented
    new = dict(self)
    new.update(other)
    return new

def __ior__(self, other):
    dict.update(self, other)
    return self