Schema validation for Xarray objects

Overview

xarray-schema

Schema validation for Xarray

CI MIT License

installation

This package is in the early stages of development. Install it from source:

pip install git+git://github.com/carbonplan/xarray-schema

usage

Xarray-schema's API is modeled after Pandera. The DataArraySchema and DatasetSchema objects both have .validate() methods.

The basic usage is as follows:

import numpy as np
import xarray as xr
from xarray_schema import DataArraySchema, DatasetSchema

da = xr.DataArray(np.ones(4, dtype='i4'), dims=['x'], name='foo')

schema = DataArraySchema(dtype=np.integer, name='foo', shape=(4, ), dims=['x'])

schema.validate(da)

roadmap

This is a very early prototype of a library. Some key things are missing:

  1. Validation of coords, chunks, and attrs. None of these are implemented yet.
  2. Class-based schema's for parts of the Xarray data model. Most validations are currently made as direct comparisons (da.name == self.name) but a more robust approach is possible that leverages classes for each component of the data model. We're already handling some special cases using None as a sentinel value to allow for wildcard-like behavior in places (i.e. dims and shape)
  3. Exceptions: Pandera accumulates schema exceptions and reports them all at once. Currently, we are a eagerly raising SchemaErrors when the are found.

license

All the code in this repository is MIT licensed, but we request that you please provide attribution if reusing any of our digital content (graphics, logo, articles, etc.).

about us

CarbonPlan is a non-profit organization working on the science and data of carbon removal. We aim to improve the transparency and scientific integrity of carbon removal and climate solutions through open data and tools. Find out more at carbonplan.org or get in touch by opening an issue or sending us an email.

Comments
  • Fix/ignore typing errors and add mypy to ci

    Fix/ignore typing errors and add mypy to ci

    Thanks for this package! It looks like it could very useful!

    I thought I would contribute by adding type checking.

    • Fix some typing errors
    • Ignore some other typing errors that seem to be caused by an incompatibility between the use of properties in this project and what mypy expects.
    • Add mypy to dev requirements
    • Add mypy to CI using invoke
    • Add invoke to dev requirements

    I tried to add a mypy pre-commit hook, but this caused pre-commit CI to fail. I think this may be because the pre-commit CI is not able to install the correct requirements.

    opened by paiforsyth 4
  • Bump mypy from 0.982 to 0.990

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    dependencies python 
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    Support caching poetry dependencies and caching on GHES 3.5

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    See more usage examples in the documentation

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    dependencies github_actions 
    opened by dependabot[bot] 3
  • Chunks

    Chunks

    Three changes:

    • Building out some checks in the chunks schema.
    • Adding a check that the input is actually a da, since if it's a dataset the chunk routines will fail for the wrong reason.
    • Remove the return of the da at the end since I think we just want it to continue without returning anything.
    opened by orianac 3
  • parsing method in xarray-schema

    parsing method in xarray-schema

    hi,

    thanks for the really great package. I was wondering if there is any plan to also provide methods for parsing array-like data following the pre-defined schemas. In particular, similar to what xarray-dataclasses provides.

    possibly related to #12

    thanks!

    opened by giovp 2
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  • Bump actions/cache from 3.0.5 to 3.0.6

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    v3.0.6

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    • Add example for clojure lein project dependencies by @​shivamarora1 in PR actions/cache#835
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    • Fixed #809 - zstd -d: no such file or directory error
    • Fixed #833 - cache doesn't work with github workspace directory
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  • Bump types-setuptools from 65.6.0.2 to 65.6.0.3

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  • Bump mypy from 0.982 to 0.991

    Bump mypy from 0.982 to 0.991

    Bumps mypy from 0.982 to 0.991.

    Commits
    • b7788fc Update version to remove "+dev" for releasing 0.991
    • 6077d19 manually CP typeshed #9130
    • ab0ea1e Fix crash with function redefinition (#14064)
    • 592a9ce Fix another crash with report generation on namespace packages (#14063)
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    dependencies python 
    opened by dependabot[bot] 3
  • Minimal Dataset coords and dims validation

    Minimal Dataset coords and dims validation

    What would be the minimal implementation to be merged here?

    My use case is simply to check if a dataset has specific coords and dims. I could go one step further to check that each coord is indexed by specific dim.

    I might just give this a try, but is there a can of worms I am simply not anticipating here?

    Cheers!

    https://github.com/carbonplan/xarray-schema/blob/a25777c55dde98d5732f48423706da4fc81cd1fd/xarray_schema/dataset.py#L60

    good first issue 
    opened by ljstrnadiii 2
  • Extract schema from xarray objects

    Extract schema from xarray objects

    One way users may want to generate schemas is from xarray objects directly. We could add a utility here that supports this workflow.

    This could be a function

    schema = create_schema(ds)
    

    Or a class method:

    schema = DatasetSchema.from_dataset(ds)
    

    Or as an Xarray accessor extension:

    schema = ds.schema.create()
    
    enhancement good first issue 
    opened by jhamman 0
Releases(0.0.3)
  • 0.0.3(Apr 5, 2022)

    What's Changed

    • update np.typing import by @jhamman in https://github.com/carbonplan/xarray-schema/pull/29

    Full Changelog: https://github.com/carbonplan/xarray-schema/compare/0.0.2...0.0.3

    Source code(tar.gz)
    Source code(zip)
  • 0.0.2(Apr 5, 2022)

    What's Changed

    • expose SchemaError in init by @tcchiao in https://github.com/carbonplan/xarray-schema/pull/14

    New Contributors

    • @tcchiao made their first contribution in https://github.com/carbonplan/xarray-schema/pull/14

    Full Changelog: https://github.com/carbonplan/xarray-schema/compare/0.0.1...0.0.2

    Source code(tar.gz)
    Source code(zip)
Owner
carbonplan
Data and science for climate action
carbonplan
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