{"id":207,"library":"polars","title":"Polars","description":"Polars is a blazingly fast DataFrame library implemented in Rust with a Python interface. Current version is 1.40.1. It follows a rapid release cadence with frequent minor and patch releases.","status":"active","version":"1.40.1","language":"python","source_language":"en","source_url":"https://github.com/pola-rs/polars","tags":["dataframe","data-analysis","big-data","rust","polars"],"install":[{"cmd":"pip install polars","lang":"bash","label":"Install Polars from PyPI"},{"cmd":"pip install 'polars[all]'","lang":"bash","label":"Install Polars with all optional dependencies"}],"dependencies":[],"imports":[{"note":"Convention is to import as 'pl' for brevity.","wrong":"import polars","symbol":"polars","correct":"import polars as pl"},{"note":"Use 'pl.DataFrame' to avoid name clashes and follow idiomatic usage.","wrong":"from polars import DataFrame","symbol":"DataFrame","correct":"import polars as pl; pl.DataFrame"}],"quickstart":{"code":"import polars as pl\n\ndf = pl.DataFrame({'name': ['Alice', 'Bob'], 'age': [30, 25]})\nprint(df.filter(pl.col('age') > 26))","lang":"python","description":"Simple example creating a DataFrame and applying a filter."},"warnings":[{"fix":"Review the 1.0 migration guide: https://pola-rs.github.io/polars/py-polars/html/reference/migration/1.0.html","message":"Starting from Polars 1.0, default behavior may differ from previous major versions. Check migration guide.","severity":"breaking","affected_versions":">=1.0.0"},{"fix":"Replace retries=n with storage_options={'max_retries': n} when reading from cloud storage.","message":"The 'retries' parameter in read functions is deprecated; use 'storage_options={\"max_retries\": n}' instead.","severity":"deprecated","affected_versions":">=1.38.0"},{"fix":"Use Polars' own interoperability functions (e.g., to_arrow, from_arrow) instead.","message":"Support for the DataFrame interchange protocol is deprecated and will be removed in a future version.","severity":"deprecated","affected_versions":">=1.40.0"},{"fix":"Always call .collect() on LazyFrame to execute and get a DataFrame.","message":"Polars is lazy by default; operations build a query plan until collect() is called. Forgetting to call collect() returns a LazyFrame, not a DataFrame.","severity":"gotcha","affected_versions":"all"}],"env_vars":null,"search_vec":"'1.40.1':19 'analysi':35 'big':37 'big-data':36 'blaze':5 'cadenc':25 'current':16 'data':34,38 'data-analysi':33 'datafram':7,32 'fast':6 'follow':21 'frequent':27 'implement':9 'interfac':15 'librari':8 'minor':28 'patch':30 'polar':1,2,40 'python':14 'rapid':23 'releas':24,31 'rust':11,39 'version':17","created_at":"2026-03-25T18:35:27.141417+00:00","updated_at":"2026-05-01T08:12:06.703325+00:00","problems":[{"fix":"Use pl.col('name') as an expression, e.g., df.select(pl.col('name')). Do not add parentheses after it.","cause":"Using pl.col('name') as a function call instead of an expression.","error":"TypeError: 'Expr' object is not callable"},{"fix":"Install the correct package: pip install polars. Verify import with 'import polars as pl; print(pl.__version__)'.","cause":"Installed polars-lts-cpu or polars-u64-id instead of the main polars package, or wrong import path.","error":"AttributeError: module 'polars' has no attribute 'DataFrame'"},{"fix":"Check Polars release notes for removed functions and update your code accordingly. Use stable APIs like pl.col() or pl.lit().","cause":"Using a deprecated or removed function due to version mismatch.","error":"ComputeError: could not include module ..."},{"fix":"Ensure data types are compatible. If persists, report a bug with a minimal reproducible example on GitHub.","cause":"Internal error in Rust backend, often due to unsupported data types or operations.","error":"PanicException: called `Result::unwrap()` on an `Err` value"}],"ecosystem":"pypi","meta_description":null,"install_score":97,"quickstart_score":77,"quickstart_tag":"verified","pypi_latest":"1.41.2","cli_name":"","cli_version":null,"type":"library","homepage":"https://www.pola.rs/","github":"https://github.com/pola-rs/polars","docs":"https://docs.pola.rs/api/python/stable/reference/index.html","changelog":"https://github.com/pola-rs/polars/releases","pypi":"https://pypi.org/project/polars/","npm":null,"openapi_spec":null,"status_page":null,"smithery":null,"categories":["data","serialization"],"base_url":null,"auth_type":null,"provenance":{"verified_status":"passing","verified_at":"2026-06-29","last_verified":"2026-06-29","next_check":"2026-07-29","install_tag":"verified"}}