s3-path-wrangler

Description

Provides S3 path manipulation, similar to PurePath in pathlib. S3Path is only meant for path manipulation and does not implement any methods which interact with S3 itself. Avoiding S3 interaction means that a user can use their own boto3 session and are not forced to use the default one.

For S3Path implementations that do path manipulation and interaction, see s3path instead.

Installation

This is a pure python package, so it can be installed with pip install s3-path-wrangler or any other dependency manager.

Usage

This library provides a single (meant to be) immutable class - S3Path. Class features:

from s3_path_wrangler.paths import S3Path

# various options for creating path objects
full_path = S3Path("s3://your-bucket/some/path/file.json")
from_list = S3Path.from_parts(["your-bucket", "some", "path", "file.json"], is_absolute=True)
relative = S3Path("some/path/")
relative_from_list = S3Path.from_parts(["some", "path"]) # or is_absolute=False

# convenient attributes
assert full_path.parts == ["your-bucket", "some", "path", "file.json"]
assert full_path.is_absolute == True
assert full_path.bucket == "your-bucket"
assert full_path.key == "some/path/file.json"
assert full_path.name == "file.json"
assert full_path.parent == S3Path("s3://your-bucket/some/path")

# paths are comparable to strings (directories will not have trailing slashes)
assert S3Path.from_parts(["some", "path"]) == "some/path"

# paths can be manipulated via '/'
assert relative / "file.json" == S3Path("some/path/file.json")

Development

This library uses the poetry package manager, which has to be installed before installing other dependencies. Afterwards, run poetry install to create a virtualenv and install all dependencies.

Black is used (and enforced via workflows) to format all code. Poetry will install it automatically, but running it is up to the user. To format the entire project, run black ..

To run tests, either activate the virtualenv via poetry shell and run pytest ./tests, or simply run poetry run pytest ./tests.

Contributing

This project uses the Apache 2.0 license and is maintained by the data science team @ Barbora. All contribution are welcome in the form of PRs or raised issues.