grizz 0.0.3

A light library to preprocess data with polars

grizz

Overview

grizz is a light library to ingest and transform data in polars DataFrame. grizz uses an object-oriented strategy, where ingestors and transformers are building blocks that can be combined together. grizz can be extend to add custom DataFrame ingestors and transformers. For example, the following example shows how to change the casting of some columns.

>>> import polars as pl
>>> from grizz.transformer import Cast
>>> transformer = Cast(columns=["col1", "col3"], dtype=pl.Int32)
>>> frame = pl.DataFrame(
...     {
...         "col1": [1, 2, 3, 4, 5],
...         "col2": ["1", "2", "3", "4", "5"],
...         "col3": ["1", "2", "3", "4", "5"],
...         "col4": ["a", "b", "c", "d", "e"],
...     }
... )
>>> out = transformer.transform(frame)
>>> out
shape: (5, 4)
┌──────┬──────┬──────┬──────┐
│ col1 ┆ col2 ┆ col3 ┆ col4 │
│ ---  ┆ ---  ┆ ---  ┆ ---  │
│ i32  ┆ str  ┆ i32  ┆ str  │
╞══════╪══════╪══════╪══════╡
│ 1    ┆ 1    ┆ 1    ┆ a    │
│ 2    ┆ 2    ┆ 2    ┆ b    │
│ 3    ┆ 3    ┆ 3    ┆ c    │
│ 4    ┆ 4    ┆ 4    ┆ d    │
│ 5    ┆ 5    ┆ 5    ┆ e    │
└──────┴──────┴──────┴──────┘

• Documentation
• Installation
• Contributing
• API stability
• License

Documentation

• latest (stable): documentation from the latest stable release.
• main (unstable): documentation associated to the main branch of the repo. This documentation may contain a lot of work-in-progress/outdated/missing parts.

Installation

We highly recommend installing a virtual environment. grizz can be installed from pip using the following command:

pip install grizz

To make the package as slim as possible, only the minimal packages required to use grizz are installed. To include all the dependencies, you can use the following command:

pip install grizz[all]

Please check the get started page to see how to install only some specific dependencies or other alternatives to install the library. The following is the corresponding grizz versions and their dependencies.

grizz	coola	iden	objectory	polars	python
main	>=0.7,<1.0	>=0.0.4,<1.0	>=0.1,<1.0	>=1.0,<2.0	>=3.9,<3.13

Optional dependencies

grizz	clickhouse-connect*	pyarrow*	tqdm*
main	>=0.7,<1.0	>=10.0,<17.0	>=4.65,<5.0

^* indicates an optional dependency

Contributing

Please check the instructions in CONTRIBUTING.md.

Suggestions and Communication

Everyone is welcome to contribute to the community. If you have any questions or suggestions, you can submit Github Issues. We will reply to you as soon as possible. Thank you very much.

API stability

:warning: While grizz is in development stage, no API is guaranteed to be stable from one release to the next. In fact, it is very likely that the API will change multiple times before a stable 1.0.0 release. In practice, this means that upgrading grizz to a new version will possibly break any code that was using the old version of grizz.

License

grizz is licensed under BSD 3-Clause "New" or "Revised" license available in LICENSE file.