polars-ds

library0.11.2pypypi✓ verified 86d ago

A Python extension for Polars that adds extra data structures and algorithms (e.g., graph, set operations, linear algebra) as expressions and series. Version 0.11.2, released on PyPI, actively maintained with frequent updates.

data database

pip install polars-ds

package ↗

INSTALL

IMPORT

SIG · POLARS-DS

polars-ds

datapythonv0.11.2

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

DataFrame

✓ import polars as pl

polars-ds extends Polars' DataFrame; no separate imports needed

Graph

✓ from polars_ds.graph import Graph

Main public API for graph functionality

ext

✓ import polars_ds.ext

✗ import polars_ds

polars_ds itself does not export ext; must explicitly import polars_ds.ext to use extra expressions

Compute L1 normalization on column 'a' using polars-ds extended expressions.

import polars as pl import polars_ds.ext as pds df = pl.DataFrame({'a': [1, 2, 3], 'b': [4, 5, 6]}) result = df.select(pds.col('a').l1_normalize()) print(result)

Debug

Known issues

gotchapolars_ds.ext must be imported explicitly to use expression extensions; just importing polars_ds does not register them.

fix

Add 'import polars_ds.ext' to your code.

affects: all

deprecatedThe 'polars_ds.graph.Graph' class API changed in v0.9.0; old methods like 'graph.nodes()' now return a Polars expression instead of a list.

fix

Update to use new expression-based API; refer to migration guide in docs.

affects: <0.9.0

breakingIn v0.10.0, 'polars_ds.ext' moved from a module to a subpackage; imports like 'from polars_ds.ext import l1_normalize' no longer work. Use 'import polars_ds.ext as pds' then 'pds.l1_normalize'.

fix

Change import to 'import polars_ds.ext as pds'.

affects: >=0.10.0

gotchapolars-ds requires Polars 0.20.x or newer; using older Polars leads to import errors or missing symbols.

fix

Upgrade Polars: pip install 'polars>=0.20.0'

affects: all

Errors

Common errors & fixes

ImportError: cannot import name 'Graph' from 'polars_ds'

Graph is in submodule polars_ds.graph, not top-level.

fix

Use: from polars_ds.graph import Graph

AttributeError: 'Expr' object has no attribute 'l1_normalize'

Did not import polars_ds.ext before calling extension methods.

fix

Add 'import polars_ds.ext' before using extension expressions.

TypeError: 'Expr' object is not callable

Incorrect syntax: tried to call extension method directly on column, e.g., pl.col('a').l1_normalize() without importing ext.

fix

Either use pds.col('a').l1_normalize() after importing polars_ds.ext, or apply via df.select(pds.col('a').l1_normalize()).

ModuleNotFoundError: No module named 'polars_ds'

Library not installed or installed in wrong environment.

fix

Run: pip install polars-ds

Upgrade

Version history

0.11.2latest on PyPI · released Apr 30, 2026

Audit

Dependencies

polarsrequiredCore dependency, polars-ds extends Polars

Agent activity

4 hits · last 30 days

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Resources

packagehttps://pypi.org/project/polars-ds/ ↗