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Merged
merged 1 commit into from
Mar 28, 2023
Merged

poison __iter__ #113

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14 changes: 13 additions & 1 deletion spec/API_specification/dataframe_api/dataframe_object.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
from __future__ import annotations
from typing import Sequence, Union, TYPE_CHECKING
from typing import Sequence, Union, TYPE_CHECKING, NoReturn

if TYPE_CHECKING:
from .column_object import Column
Expand Down Expand Up @@ -418,6 +418,18 @@ def __divmod__(self, other: DataFrame | Scalar) -> tuple[DataFrame, DataFrame]:
"""
...

def __iter__(self) -> NoReturn:
"""
Iterate over elements.

This is intentionally "poisoned" to discourage inefficient code patterns.

Raises
------
NotImplementedError
"""
raise NotImplementedError("'__iter__' is intentionally not implemented.")

def any(self, skipna: bool = True) -> DataFrame:
"""
Reduction returns a 1-row DataFrame.
Expand Down