Document that dict.get takes no keyword arguments

[adamtheturtle]

Running

{}.get("a", default="b")

gives:

    {}.get("a", default="b")
    ~~~~~~^^^^^^^^^^^^^^^^^^
TypeError: dict.get() takes no keyword arguments

---

Relatedly, this means that dict does not implement collections.abc.Mapping which does allow keyword arguments:

cpython/Lib/_collections_abc.py

Line 808 in 6f3c2c8

def get(self, key, default=None):

---

📚 Documentation preview 📚: https://cpython-previews--128207.org.readthedocs.build/

[ZeroIntensity]

Relatedly, this means that dict does not implement collections.abc.Mapping which does allow keyword arguments:

Interesting. I wonder if that's worth fixing (but I also wonder if this has been brought up before).

[ZeroIntensity]

but I also wonder if this has been brought up before

Oh, I didn't see that there is! #124675...where I participated in the discussion 😅

[adamtheturtle]

Interesting. I wonder if that's worth fixing (but I also wonder if this has been brought up before).

I would like for it to be fixed, and I have commented on a related issue (#124675).

As for "brought up before" - I'm not sure here, but I found this comment in typeshed:

    # Positional-only in dict, but not in MutableMapping
    @overload  # type: ignore[override]
    def get(self, key: _KT, /) -> _VT | None: ...
    @overload

https://github.com/python/typeshed/blob/17408ee5381f866c100f5003119a7a1bf050b839/stdlib/builtins.pyi#L1125C1-L1128C14

and discussion around that at python/typeshed#6694.

[adamtheturtle]

Oh, I didn't see that there is! https://github.com/python/cpython/issues/124675...where I participated in the discussion 😅

FWIW when you asked I pasted my issue text into ChatGPT and asked "I want to write up this bug for CPython. Has any duplicate issue been brought up before?". It found me that issue!