ci: bump narwhals>=1.27.1 (#3807)

altair/utils/core.py

@@ -38,6 +38,8 @@
     from altair.utils._dfi_types import DataFrame as DfiDataFrame
     from altair.vegalite.v5.schema._typing import StandardType_T as InferredVegaLiteType
 
+    _PandasDataFrameT = TypeVar("_PandasDataFrameT", bound="pd.DataFrame")
+
 TIntoDataFrame = TypeVar("TIntoDataFrame", bound=IntoDataFrame)
 T = TypeVar("T")
 P = ParamSpec("P")
@@ -328,7 +330,7 @@ def numpy_is_subtype(dtype: Any, subtype: Any) -> bool:
         return False
 
 
-def sanitize_pandas_dataframe(df: pd.DataFrame) -> pd.DataFrame:  # noqa: C901
+def sanitize_pandas_dataframe(df: _PandasDataFrameT) -> _PandasDataFrameT:  # noqa: C901
     """
     Sanitize a DataFrame to prepare it for serialization.
 
@@ -351,7 +353,7 @@ def sanitize_pandas_dataframe(df: pd.DataFrame) -> pd.DataFrame:  # noqa: C901
     import numpy as np
     import pandas as pd
 
-    df = df.copy()
+    df = cast("_PandasDataFrameT", df.copy())
 
     if isinstance(df.columns, pd.RangeIndex):
         df.columns = df.columns.astype(str)

altair/utils/data.py

@@ -350,20 +350,16 @@ def _compute_data_hash(data_str: str) -> str:
     return hashlib.sha256(data_str.encode()).hexdigest()[:32]
 
 
-def _from_geo_interface(data: SupportsGeoInterface | Any) -> dict[str, Any]:
+def _from_geo_interface(data: SupportsGeoInterface) -> dict[str, Any]:
     """
     Santize a ``__geo_interface__`` w/ pre-santize step for ``pandas`` if needed.
 
-    Notes
-    -----
-    Split out to resolve typing issues related to:
-    - Intersection types
-    - ``typing.TypeGuard``
-    - ``pd.DataFrame.__getattr__``
+    Introduces an intersection type::
+
+        geo: <subclass of SupportsGeoInterface and DataFrame> | SupportsGeoInterface
     """
-    if is_pandas_dataframe(data):
-        data = sanitize_pandas_dataframe(data)
-    return sanitize_geo_interface(data.__geo_interface__)
+    geo = sanitize_pandas_dataframe(data) if is_pandas_dataframe(data) else data
+    return sanitize_geo_interface(geo.__geo_interface__)
 
 
 def _data_to_json_string(data: DataType) -> str:

pyproject.toml

@@ -20,7 +20,7 @@ dependencies = [
     # If you update the minimum required jsonschema version, also update it in build.yml
     "jsonschema>=3.0",
     "packaging",
-    "narwhals>=1.26.0"
+    "narwhals>=1.27.1"
 ]
 description = "Vega-Altair: A declarative statistical visualization library for Python."
 readme = "README.md"