v0.30.1

What's Changed

• Refactor Pandera accessors to use schema registry for managing schemas by @cosmicBboy in #2241
• polars: support instance types by @paramsehrdl in #2239

New Contributors

• @paramsehrdl made their first contribution in #2239

Full Changelog: v0.30.0...v0.30.1

v0.30.0: Support Pandas >=3 🐼

⭐️ Highlight

Pandera now supports Pandas >= 3!

What's Changed

• Support pandas 3.0 by @cosmicBboy in #2214
• Replace pre-commit with prek and fix existing violations by @Dev-iL in #2225
• Remove vestigial ordering parameter from polars Categorical by @Dev-iL in #2226
• Add AGENTS.md by @Dev-iL in #2224
• fix optional nested validation by @amerberg in #2218
• [🐼 pandas 3] change default string to pandas-native string by @cosmicBboy in #2229
• Refactor empty DataFrame creation in DataFrameModel to eliminate deep copy by @cosmicBboy in #2230
• implement PydanticModel for polars by @cosmicBboy in #2231
• polars column regex reports column name by @cosmicBboy in #2233
• fix bug in custom parser, built-in check, drop invalid rows by @cosmicBboy in #2234
• unpin geopandas by @cosmicBboy in #2236
• fix pandas docs reference in conf.py by @cosmicBboy in #2237

New Contributors

• @Dev-iL made their first contribution in #2225

Full Changelog: v0.29.0...v0.30.0

Release 0.29.0: support list, dict, and tuple of dataframes

⭐️ Highlight

Pandera now supports collection types containing dataframes, shoutout to @garethellis0 with an amazing first contribution!

@pa.check_types
def process_tuple_and_return_dict(
    dfs: tuple[DataFrame[OnlyZeroesSchema], DataFrame[OnlyOnesSchema]],
) -> dict[str, DataFrame[OnlyZeroesSchema]]:
    return {
        "foo": dfs[0],
        "bar": dfs[0]
    }


result = process_tuple_and_return_dict((
    pd.DataFrame({"a": [0, 0]}),
    pd.DataFrame({"a": [1, 1]}),
))
print(result)

What's Changed

• feature/1078: Added Support For List, Dict, And Tuples Of Dataframes by @garethellis0 in #2204
• pin sphinx version by @cosmicBboy in #2208
• Add map datatype to the Ibis engine implementation by @deepyaman in #2206

New Contributors

• @garethellis0 made their first contribution in #2204

Full Changelog: v0.28.1...v0.29.0

v0.28.1: Fix regressions in Check behavior

What's Changed

• fix bugs in Check interface and Field by @cosmicBboy in #2203

Full Changelog: v0.28.0...v0.28.1

Release 0.28.0: Add support for Pyspark 4

⭐️ Highlight

Pandera now supports Pyspark 4 🚀

What's Changed

• refactor(pyspark): restructure pyspark components by @ELC in #2007
• add support for pyspark 4 by @cosmicBboy in #2193
• Decouple import dependencies for io serialization formats by @cosmicBboy in #2195
• Use get_annotations instead of direct __annotations__ access by @amerberg in #2196
• Re-implement improvements to str_length check by @cosmicBboy in #2198
• Support the Decimal data type in the Ibis engine by @deepyaman in #2194
• Update .git-blame-ignore-revs to add Ruff refactor by @deepyaman in #2199
• Avoid full materialization of levels in failing MultiIndex validations by @amerberg in #2187
• schema descriptor should raise AttributeError if build_schema_ is not implemented by @amerberg in #2197

New Contributors

• @ELC made their first contribution in #2007

Full Changelog: v0.27.1...v0.28.0

Release v0.27.1: bugfix related to numpy==2.4.0

What's Changed

• enhancement #2122 by @Jarek-Rolski in #2177
• Fix failure_cases index value for MultiIndex schema errors by @amerberg in #2186
• handle new numpy 2.4.0 ValueError when type is not recognized by @cosmicBboy in #2191

Full Changelog: v0.27.0...v0.27.1

v0.27.0: Support Python 3.14

⭐️ Highlight

Pandera now supports Python 3.14! We also dropped support for Python 3.9

What's Changed

• scipy-stubs by @jorenham in #2121
• bugfix: set SPARK_LOCAL_IP to 127.0.0.1 if not set. by @cosmicBboy in #2123
• fix: collect failure_cases in check_column_values_are_unique by @MikeEvansLarah in #2120
• Adding import to code example in data_synthesis_strategies.md by @OwenLund in #2126
• Pin DuckDB<1.4.0 in dev env due to breaking change by @deepyaman in #2140
• fix mypy polars issues by @cosmicBboy in #2142
• Add descriptors to DataFrameModel by @lundybernard in #2136
• Support nonnullable equivalents for all data types by @deepyaman in #2146
• Fix failure case count for Ibis tables and strings by @deepyaman in #2145
• Implement check_nullable checks for Ibis backend by @deepyaman in #2149
• feat: create empty dataframe with index (and multiindex) when present… by @davidkleiven in #2133
• Bugfix/1994 Error loading frictionless schema by @Jarek-Rolski in #2159
• Do not pass removed name argument to memtables by @deepyaman in #2162
• Fix: Add enum.Enum serialization support for to_json() by @chris-wright-nl in #2163
• Implement drop_invalid_rows for the Ibis backend by @deepyaman in #2151
• Support Python 3.14 by @glatterf42 in #2158
• optimize pandas MultiIndex validation by avoiding materializing level values when possible by @amerberg in #2118
• fix: remove pandas.concat signature hook by @kitagry in #2173
• add codecov token to ci by @cosmicBboy in #2175
• Use Ruff instead of Black, pyupgrade and isort by @deepyaman in #2171

New Contributors

• @jorenham made their first contribution in #2121
• @MikeEvansLarah made their first contribution in #2120
• @OwenLund made their first contribution in #2126
• @chris-wright-nl made their first contribution in #2163
• @glatterf42 made their first contribution in #2158
• @kitagry made their first contribution in #2173

Full Changelog: v0.26.1...v0.27.0

v0.27.0b0: beta release, add Python 3.14

What's Changed

• scipy-stubs by @jorenham in #2121
• bugfix: set SPARK_LOCAL_IP to 127.0.0.1 if not set. by @cosmicBboy in #2123
• fix: collect failure_cases in check_column_values_are_unique by @MikeEvansLarah in #2120
• Adding import to code example in data_synthesis_strategies.md by @OwenLund in #2126
• Pin DuckDB<1.4.0 in dev env due to breaking change by @deepyaman in #2140
• fix mypy polars issues by @cosmicBboy in #2142
• Add descriptors to DataFrameModel by @lundybernard in #2136
• Support nonnullable equivalents for all data types by @deepyaman in #2146
• Fix failure case count for Ibis tables and strings by @deepyaman in #2145
• Implement check_nullable checks for Ibis backend by @deepyaman in #2149
• feat: create empty dataframe with index (and multiindex) when present… by @davidkleiven in #2133
• Bugfix/1994 Error loading frictionless schema by @Jarek-Rolski in #2159
• Do not pass removed name argument to memtables by @deepyaman in #2162
• Fix: Add enum.Enum serialization support for to_json() by @chris-wright-nl in #2163
• Implement drop_invalid_rows for the Ibis backend by @deepyaman in #2151
• Support Python 3.14 by @glatterf42 in #2158
• optimize pandas MultiIndex validation by avoiding materializing level values when possible by @amerberg in #2118
• fix: remove pandas.concat signature hook by @kitagry in #2173

New Contributors

• @jorenham made their first contribution in #2121
• @MikeEvansLarah made their first contribution in #2120
• @OwenLund made their first contribution in #2126
• @chris-wright-nl made their first contribution in #2163
• @glatterf42 made their first contribution in #2158
• @kitagry made their first contribution in #2173

Full Changelog: v0.26.1...v0.27.0b0

v0.26.1: Multi-index, `@check_types` Bugfixes

What's Changed

• fix MultiIndex check regression by @amerberg in #2116
• implement multiindex_strict and multiindex_unique add test cases by @amerberg in #2114
• Bugfix: #2058 Check_types for callable by @ybressler in #2069

New Contributors

• @ybressler made their first contribution in #2069

Full Changelog: v0.26.0...v0.26.1

v0.26.0: Add support for Python 3.13

⭐️ Highlight

📣 Pandera now supports Python 3.13! Now go forth and use bare forward reference types to your hearts content 🤗

What's Changed

• Enh/future annotations py3.13 by @cosmicBboy in #1980
• fix pyspark check registration by @cosmicBboy in #2087
• remove top-level pandera init import warning by @cosmicBboy in #2088
• Bugfix 2075: Polar dataframe default values - fill_nan AND fill_null for float columns by @cmsommerville in #2076
• Remove pylint by @cosmicBboy in #2086
• Upgrade pyupgrade hook and target Python version by @deepyaman in #2093
• Fix passing an empty column list to check duplicates by @rush4ratio in #2092
• Replace Literal imports from typing_extensions by @deepyaman in #2100
• Add .git-blame-ignore-revs to avoid bulk changes by @deepyaman in #2101
• limit polars version on Mac OS by @amerberg in #2105
• delete monthly downloads, not available by @cosmicBboy in #2112
• Implement parser machinery and the strict parser by @deepyaman in #2096
• Support checking joint uniqueness of table columns by @deepyaman in #2097
• Reimplement pandas MultiIndex backend without inheriting from DataFrame backend by @amerberg in #2103
• fix(doc): clarify check_fn signature by @Farley-Chen in #2107
• Fix missing tests core directory by @rush4ratio in #2102
• fix polars Categorical bug by @cosmicBboy in #2113

New Contributors

• @cmsommerville made their first contribution in #2076
• @rush4ratio made their first contribution in #2092
• @Farley-Chen made their first contribution in #2107

Full Changelog: v0.25.0...v0.26.0