add Column.len

data-apis · Nov 21, 2023 · fa4fb66 · fa4fb66
1 parent 61adbc3
commit fa4fb66
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Showing 2 changed files with 6 additions and 6 deletions.
diff --git a/spec/API_specification/dataframe_api/column_object.py b/spec/API_specification/dataframe_api/column_object.py
@@ -90,10 +90,6 @@ def name(self) -> str:
         """Return name of column."""
         ...
 
-    def __len__(self) -> int:
-        """Return the number of rows."""
-        ...
-
     def __iter__(self) -> NoReturn:
         """Iterate over elements.
 
@@ -750,6 +746,10 @@ def var(
         """
         ...
 
+    def len(self) -> Scalar:
+        """Return the number of rows."""
+        ...
+
     def cumulative_max(self) -> Self:
         """Reduction returns a Column.
 

diff --git a/spec/API_specification/dataframe_api/typing.py b/spec/API_specification/dataframe_api/typing.py
@@ -69,7 +69,7 @@ class NullType:
     null: NullType
 
     class Datetime:
-        time_unit: Literal['ms', 'us']
+        time_unit: Literal["ms", "us"]
         time_zone: str | None
 
         def __init__(  # noqa: ANN204
@@ -80,7 +80,7 @@ def __init__(  # noqa: ANN204
             ...
 
     class Duration:
-        time_unit: Literal['ms', 'us']
+        time_unit: Literal["ms", "us"]
 
         def __init__(  # noqa: ANN204
             self,