chore(pyright): #1171 return None when possible; disable reportUnknownLambdaType

pyrightconfig-strict.json

@@ -5,5 +5,6 @@
   "enableTypeIgnoreComments": false,
   "reportUnnecessaryTypeIgnoreComment": true,
   "reportMissingModuleSource": true,
-  "useLibraryCodeForTypes": false
+  "useLibraryCodeForTypes": false,
+  "reportUnknownLambdaType": false
 }

scripts/_job.py

@@ -14,7 +14,7 @@ class Step:
     rollback: Callable[[], None] | None = None
 
 
-def __rollback_job(steps: deque[Step]):
+def __rollback_job(steps: deque[Step]) -> None:
     """
     Responsible to run rollback of steps.
     """

scripts/test/__init__.py

@@ -25,7 +25,7 @@ def test(
     src: bool = False,
     dist: bool = False,
     type_checker: Literal["", "mypy", "pyright"] = "",
-):
+) -> None:
     steps = []
     if src:
         steps.extend(_SRC_STEPS)

scripts/test/run.py

@@ -5,32 +5,32 @@
 import sys
 
 
-def mypy_src():
+def mypy_src() -> None:
     cmd = ["mypy", "pandas-stubs", "tests", "--no-incremental"]
     subprocess.run(cmd, check=True)
 
 
-def pyright_src():
+def pyright_src() -> None:
     cmd = ["pyright"]
     subprocess.run(cmd, check=True)
 
 
-def pyright_src_strict():
+def pyright_src_strict() -> None:
     cmd = ["pyright", "--project", "pyrightconfig-strict.json"]
     subprocess.run(cmd, check=True)
 
 
-def pytest():
+def pytest() -> None:
     cmd = ["pytest", "--cache-clear"]
     subprocess.run(cmd, check=True)
 
 
-def style():
+def style() -> None:
     cmd = ["pre-commit", "run", "--all-files", "--verbose"]
     subprocess.run(cmd, check=True)
 
 
-def stubtest(allowlist: str = "", check_missing: bool = False):
+def stubtest(allowlist: str = "", check_missing: bool = False) -> None:
     cmd = [
         sys.executable,
         "-m",
@@ -47,47 +47,47 @@ def stubtest(allowlist: str = "", check_missing: bool = False):
     subprocess.run(cmd, check=True)
 
 
-def build_dist():
+def build_dist() -> None:
     cmd = ["poetry", "build", "-f", "wheel"]
     subprocess.run(cmd, check=True)
 
 
-def install_dist():
+def install_dist() -> None:
     path = sorted(Path("dist/").glob("pandas_stubs-*.whl"))[-1]
     cmd = [sys.executable, "-m", "pip", "install", "--force-reinstall", str(path)]
     subprocess.run(cmd, check=True)
 
 
-def rename_src():
+def rename_src() -> None:
     if Path(r"pandas-stubs").exists():
         Path(r"pandas-stubs").rename("_pandas-stubs")
     else:
         raise FileNotFoundError("'pandas-stubs' folder does not exists.")
 
 
-def mypy_dist():
+def mypy_dist() -> None:
     cmd = ["mypy", "tests", "--no-incremental"]
     subprocess.run(cmd, check=True)
 
 
-def pyright_dist():
+def pyright_dist() -> None:
     cmd = ["pyright", "tests"]
     subprocess.run(cmd, check=True)
 
 
-def uninstall_dist():
+def uninstall_dist() -> None:
     cmd = [sys.executable, "-m", "pip", "uninstall", "-y", "pandas-stubs"]
     subprocess.run(cmd, check=True)
 
 
-def restore_src():
+def restore_src() -> None:
     if Path(r"_pandas-stubs").exists():
         Path(r"_pandas-stubs").rename("pandas-stubs")
     else:
         raise FileNotFoundError("'_pandas-stubs' folder does not exists.")
 
 
-def nightly_pandas():
+def nightly_pandas() -> None:
     cmd = [
         sys.executable,
         "-m",
@@ -110,13 +110,13 @@ def _get_version_from_pyproject(program: str) -> str:
     return version_line.split('"')[1]
 
 
-def released_pandas():
+def released_pandas() -> None:
     version = _get_version_from_pyproject("pandas")
     cmd = [sys.executable, "-m", "pip", "install", f"pandas=={version}"]
     subprocess.run(cmd, check=True)
 
 
-def nightly_mypy():
+def nightly_mypy() -> None:
     cmd = [
         sys.executable,
         "-m",
@@ -138,7 +138,7 @@ def nightly_mypy():
     )
 
 
-def released_mypy():
+def released_mypy() -> None:
     version = _get_version_from_pyproject("mypy")
     cmd = [sys.executable, "-m", "pip", "install", f"mypy=={version}"]
     subprocess.run(cmd, check=True)
@@ -152,7 +152,7 @@ def released_mypy():
     )
 
 
-def ty():
+def ty() -> None:
     cmd = [
         "ty",
         "check",
@@ -163,6 +163,6 @@ def ty():
     subprocess.run(cmd, check=True)
 
 
-def pyrefly():
+def pyrefly() -> None:
     cmd = ["pyrefly", "check", "pandas-stubs"]
     subprocess.run(cmd, check=True)

tests/indexes/test_indexes.py

@@ -223,7 +223,7 @@ def test_index_rename_inplace() -> None:
     assert ind2 is None
 
 
-def test_index_dropna():
+def test_index_dropna() -> None:
     idx = pd.Index([1, 2])
 
     check(assert_type(idx.dropna(how="all"), "pd.Index[int]"), pd.Index)
@@ -235,7 +235,7 @@ def test_index_dropna():
     check(assert_type(midx.dropna(how="any"), pd.MultiIndex), pd.MultiIndex)
 
 
-def test_index_neg():
+def test_index_neg() -> None:
     # GH 253
     idx = pd.Index([1, 2])
     check(assert_type(-idx, "pd.Index[int]"), pd.Index)
@@ -306,7 +306,7 @@ def test_index_relops() -> None:
     check(assert_type(ind > 2, np_1darray[np.bool]), np_1darray[np.bool])
 
 
-def test_range_index_union():
+def test_range_index_union() -> None:
     check(
         assert_type(
             pd.RangeIndex(0, 10).union(pd.RangeIndex(10, 20)),
@@ -342,14 +342,14 @@ def test_index_union_sort() -> None:
     )
 
 
-def test_range_index_start_stop_step():
+def test_range_index_start_stop_step() -> None:
     idx = pd.RangeIndex(3)
     check(assert_type(idx.start, int), int)
     check(assert_type(idx.stop, int), int)
     check(assert_type(idx.step, int), int)
 
 
-def test_interval_range():
+def test_interval_range() -> None:
     check(
         assert_type(pd.interval_range(0, 10), "pd.IntervalIndex[pd.Interval[int]]"),
         pd.IntervalIndex,
@@ -502,7 +502,7 @@ def test_interval_range():
     )
 
 
-def test_interval_index_breaks():
+def test_interval_index_breaks() -> None:
     check(
         assert_type(
             pd.IntervalIndex.from_breaks([1, 2, 3, 4]),
@@ -632,7 +632,7 @@ def test_interval_index_breaks():
     )
 
 
-def test_interval_index_arrays():
+def test_interval_index_arrays() -> None:
     check(
         assert_type(
             pd.IntervalIndex.from_arrays([1, 2, 3, 4], [2, 3, 4, 5]),
@@ -761,7 +761,7 @@ def test_interval_index_arrays():
     )
 
 
-def test_interval_index_tuples():
+def test_interval_index_tuples() -> None:
     check(
         assert_type(
             pd.IntervalIndex.from_tuples([(1, 2), (2, 3)]),
@@ -1082,13 +1082,13 @@ def test_range_index_range() -> None:
     check(assert_type(iri, pd.RangeIndex), pd.RangeIndex, int)
 
 
-def test_multiindex_dtypes():
+def test_multiindex_dtypes() -> None:
     # GH-597
     mi = pd.MultiIndex.from_tuples([(1, 2.0), (2, 3.0)], names=["foo", "bar"])
     check(assert_type(mi.dtypes, "pd.Series[Dtype]"), pd.Series)
 
 
-def test_index_constructors():
+def test_index_constructors() -> None:
     # See if we can pick up the different index types in 2.0
     # Eventually should be using a generic index
     ilist = [1, 2, 3]

tests/scalars/test_scalars.py

@@ -297,7 +297,7 @@ def test_interval_math() -> None:
         )  # pyright: ignore[reportOperatorIssue]
 
 
-def test_interval_cmp():
+def test_interval_cmp() -> None:
     interval_i = pd.Interval(0, 1, closed="left")
     interval_f = pd.Interval(0.0, 1.0, closed="right")
     interval_ts = pd.Interval(

tests/series/test_series.py

@@ -1819,7 +1819,7 @@ def test_types_to_dict() -> None:
     assert_type(s.to_dict(), dict[Any, str])
 
 
-def test_categorical_codes():
+def test_categorical_codes() -> None:
     # GH-111
     cat = pd.Categorical(["a", "b", "a"])
     check(assert_type(cat.codes, np_1darray[np.signedinteger]), np_1darray[np.int8])
@@ -1942,7 +1942,7 @@ def test_squeeze() -> None:
     check(assert_type(s2.squeeze(), "pd.Series[int] | Scalar"), np.integer)
 
 
-def test_to_xarray():
+def test_to_xarray() -> None:
     s = pd.Series([1, 2])
     check(assert_type(s.to_xarray(), xr.DataArray), xr.DataArray)
 
@@ -3549,7 +3549,7 @@ def test_diff() -> None:
         # str -> TypeError: unsupported operand type(s) for -: 'str' and 'str'
         pd.Series(["a", "b"]).diff()  # type: ignore[misc] # pyright: ignore[reportAttributeAccessIssue]
 
-    def _diff_invalid0():  # pyright: ignore[reportUnusedFunction]
+    def _diff_invalid0() -> None:  # pyright: ignore[reportUnusedFunction]
         # interval -> TypeError: IntervalArray has no 'diff' method. Convert to a suitable dtype prior to calling 'diff'.
         assert_type(pd.Series([pd.Interval(0, 2), pd.Interval(1, 4)]).diff(), Never)
 

tests/test_api_types.py

@@ -373,7 +373,7 @@ def test_union_categoricals() -> None:
 
 def test_check_extension_dtypes() -> None:
     # GH 315
-    def check_ext_dtype(etype: type[ExtensionDtype]):
+    def check_ext_dtype(etype: type[ExtensionDtype]) -> None:
         assert issubclass(etype, ExtensionDtype)
 
     check_ext_dtype(pd.Int64Dtype)