File formats

Polars supports the following file formats when reading from Hugging Face:

The examples below show the default settings only. There are various parameters which you can use depending on your use case. View the API reference guide for more information: Parquet, CSV, JSON

Parquet

Parquet is the preferred file format as it stores the schema with type information within the file. This avoids any ambiguity with parsing and speeds up reading. To read a parquet file in Polars do the following

pl.read_parquet("hf://datasets/roneneldan/TinyStories/data/train-00000-of-00004-2d5a1467fff1081b.parquet")

CSV

In order to read in a CSV file you can use the scan_csv method:

pl.read_csv("hf://datasets/lhoestq/demo1/data/train.csv")

JSON

Polars supports reading in new line delimited JSON also known as json lines with the read_ndjson method:

pl.read_ndjson("hf://datasets/proj-persona/PersonaHub/persona.jsonl")
< > Update on GitHub