03.12.19 07:04, Guido van Rossum пише:
Actually there's no need to optimize the |= operator -- for strings we
have to optimize += *because* strings are immutable, but for dicts we
would define |= as essentially an alias for .update(), just like the
relationship between += and .extend() for lists, and then no unnecessary
objects would be created.
Yet one question: should |= accept only dicts at right side, or
arbitrary mappings with the keys() method, or even iterables of pairs as
dict.update()?
And the same question for |. Should `{} | Mapping()` and `{} | []` work?
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