Pandera

Bugfixes

- lazy validation handles check returning scalar False value 3bf8e72fa2615f086406c1210b893cabe6b232da,
- add strict keyword to yaml 3bd2655fd5c1ff560cce1a1b6721363404bd68b1 - first contribution by staylorx 🎉🎉🎉

package uses `version.py` file for single source of truth of package version.

New Feature
- `ignore_na` keyword argument to `Check` class 180072e62270f9d6a01819a160d98afff18a4ded
drops null columns within the check function before passing to `check_fn`. The
`SeriesSchemaBase.validate` method no longer does this.

Bugfixes
- one sample hypothesis tests in the context of `Column` shouldn't need `samples` arg
0b0d6cc2a73e113c3d82419f525c851cf9e2897b
- add `lazy` kwarg to `check_input` and `check_output` 923a197f046c45ee221cdcc4c28d9f8c7c175000
- fix lazy validation with nullable columns f5051fa47e0c0d3474d4ac102300cb7c2eb3f96e

Schema Inference, Serialization, and Lazy Validation

New Features

- schema inference 202 209
- schema yaml and script serialization 203
- lazy validation on schema validation 207

Minor Improvements

- updated documentation
- define _CheckBase class 195
- simplify type-matching logic 194

Release Notes

- add support for pandas extension types, tested only for [pandas >= 1.0.0](https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.dtypes.html)
- more comprehensive testing and documentation for `PandasDtype` enum class

Release Notes

Major Enhancements

- Schema transformations to add/remove columns from a dataframe schema dcc40f4a3813f4be5f837894a1520a1b02decf84
- Add built-in checks for common data validation tasks 1be3bcc53d570b2f34f03cbda0915037921ecaba
- Add `dtype` property to DataFrameSchema and SeriesSchema objects 7aecf163ae3b24e0829a1a7464c870d745495fb7

Codebase Improvements

- update documentation
- improvements to CI 0a28e30c8fd4dfdb78736a7545d0df99f70f02d5
- improvements to linting, code quality checks cb39fd039c252f2c29cb6d185d95b21fbe4d544c
- clean up Check and SeriesSchemaBase internals 7bf2fe8cb525f9d917ff081b1fe4ccc536355070
- add airspeed velocity benchmarks ee21cdb3bea89290e456cf07c691a0e7cde26011

Bugfixes

- - fix coercion logic for string and object dtypes df364f1b1b67bc1f8d2777baca761aa89e33d33e, 7f572fc6af74131ef21c85b4fdc86c8f5c59e914