chore: follow suggestions

Signed-off-by: Henry Schreiner <[email protected]>

setup.py

@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+import functools
+import operator
 import os
 import platform
 import sys
@@ -10,6 +12,7 @@
 DIR = Path(__file__).parent.resolve()
 
 sys.path.append(str(DIR / "extern" / "pybind11"))
+
 from pybind11.setup_helpers import ParallelCompile, Pybind11Extension  # noqa: E402
 
 del sys.path[-1]
@@ -67,7 +70,7 @@
     "examples": ["matplotlib", "xarray", "xhistogram", "netCDF4", "numba", "uproot3"],
     "dev": ["ipykernel", "typer"],
 }
-extras["all"] = sum(extras.values(), [])
+extras["all"] = functools.reduce(operator.iadd, extras.values(), [])
 extras["dev"] += extras["test"]
 
 setup(ext_modules=ext_modules, extras_require=extras)

src/boost_histogram/_internal/hist.py

@@ -241,7 +241,7 @@ def __init__(
         # Check all available histograms, and if the storage matches, return that one
         for h in _histograms:
             if isinstance(storage, h._storage_type):
-                self._hist = h(axes, storage)  # type: ignore[unreachable]
+                self._hist = h(axes, storage)  # type: ignore[arg-type]
                 self.axes = self._generate_axes_()
                 return