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polars

by davila7

Fast DataFrame library (Apache Arrow). Select, filter, group_by, joins, lazy evaluation, CSV/Parquet I/O, expression API, for high-performance data analysis workflows.

Installation

Pick a client and clone the repository into its skills directory.

Installation

Quick info

Author
davila7
Category
Data Science
Views
54

About this skill

Fast DataFrame library (Apache Arrow). Select, filter, group_by, joins, lazy evaluation, CSV/Parquet I/O, expression API, for high-performance data analysis workflows.

How to use

  1. Zainstaluj Polars za pomocą menadżera pakietów: uv pip install polars. 2. Zaimportuj bibliotekę w swoim skrypcie Pythona: import polars as pl. 3. Utwórz DataFrame, przekazując słownik z danymi — każdy klucz to nazwa kolumny, a wartości to listy danych. 4. Używaj wyrażeń do manipulacji danymi: odwołuj się do kolumn za pomocą pl.col("nazwa_kolumny"), a następnie łącz metody takie jak filtrowanie (filter), wybieranie kolumn (select) czy dodawanie nowych kolumn (with_columns). 5. Dla dużych zbiorów danych użyj leniwej ewaluacji — zamiast pl.read_csv() użyj pl.scan_csv(), który buduje plan zapytania bez natychmiastowego wczytania pliku, a następnie wywołaj .collect() aby wykonać operacje. 6. Komponuj złożone transformacje, łącząc wyrażenia w metodach takich jak group_by do agregacji danych lub join do łączenia tabel.

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