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Support int_range (Eager-only) #2916

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#2895
Open
Support int_range (Eager-only)#2916
#2895
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eager-onlyenhancementNew feature or request
@dangotbanned

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@dangotbanned
dangotbanned
opened on Jul 31, 2025

Eager Support

If you stare at (#2683) close enough - we've got most of it implemented for eager backends already.
We'd just need to expose start, step - where all we've used is stop/end:

narwhals/narwhals/_arrow/dataframe.py

Line 491 in 84a1d81

row_index = pa.array(np.arange(frame.num_rows, dtype=np.int64))

narwhals/narwhals/_pandas_like/dataframe.py

Lines 426 to 433 in 84a1d81

if self._implementation.is_cudf():
import cupy as cp # ignore-banned-import # cuDF dependency.
data = cp.arange(size)
else:
import numpy as np # ignore-banned-import
data = np.arange(size)

narwhals/narwhals/_polars/dataframe.py

Line 249 in 84a1d81

pl.int_range(0, pl.len()).sort_by(order_by).alias(name), pl.all()

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