era_py

Helpers for the Python port of Empirical Research in Accounting: Tools and Methods.

Install

pip install era-py
pip install "era-py[ibis]"
pip install "era-py[polars]"
pip install "era-py[tables]"

For repository development, prefer the checked-in virtual environment:

.venv/bin/python -m pytest

era-py provides two import paths:

import era_py is the base API built around pandas workflows. Install the ibis extra for the Ibis/Postgres event-study and WRDS helpers.
import era_pl is the Polars API and requires pip install "era-py[polars]".

Usage

from era_py import data_info, load_data, ols_dropcollinear

camp = load_data("camp_attendance")
camp_info = data_info("camp_attendance")

Use data_info(name) to inspect a dataset's description, provenance, shape, schema, and variable definitions without loading its observations. Use data_catalog() to return the same information for every packaged dataset.

Testing Optional Dependencies

For quick checks of optional extras without changing your local environment, use uv run --with ...:

PYTHONPATH=src uv run --with polars python -c "import era_pl; print(era_pl.__version__)"

This is useful for verifying the era_pl import path and other Polars-specific behavior without permanently installing polars into your project environment.

Metadata

Release files for era-py 0.0.35

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for era-py 0.0.35
File	Size	Uploaded
era_py-0.0.35.tar.gz	3.0 MB	Oct 15, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for era-py 0.0.35
File	Interpreter	ABI	Platform	Reset
era_py-0.0.35-py3-none-any.whl 3.0 MB Oct 15, 2026	Python 3	none	any	Details

Total release size: 6.0 MB

Release files / era_py-0.0.35.tar.gz

Download URL	era_py-0.0.35.tar.gz
Size	3.0 MB
Tags	Source
SHA-256 checksum How to use checksums	`8fbbce68689e42476cfe444aefe6a5fbb86ef2211392f7d5f95fa731175c8fe6`
BLAKE2b-256 checksum How to use checksums	`5ac047335308b497d95c4d4bf48faeffa252b8fbe32004479f0fa8ad8f86bd19`
Upload date	Oct 15, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/6.2.0 CPython/3.14.2`

Release files / era_py-0.0.35-py3-none-any.whl

Download URL	era_py-0.0.35-py3-none-any.whl
Size	3.0 MB
Tags	Python 3
SHA-256 checksum How to use checksums	`9d06aaece5858dd0e2976b40b9bde35440ae947f57a6a23b24bb84eca33338ec`
BLAKE2b-256 checksum How to use checksums	`aa1f99055716a149d41e339a122e02b65427165cd9c199c28a8552537b3f0f84`
Upload date	Oct 15, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/6.2.0 CPython/3.14.2`