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lang-py
dict(x, **y)-solution? As you (@CarlMeyer) mentioned within the note of your own answer (stackoverflow.com/a/39858/2798610) Guido considers that solution illegal.dict(x, **y)for the (very good) reason that it relies onyonly having keys which are valid keyword argument names (unless you are using CPython 2.7, where the dict constructor cheats). This objection/restriction does not apply to PEP 448, which generalizes the**unpacking syntax to dict literals. So this solution has the same concision asdict(x, **y), without the downside.