Parsers and Derived Columns¶

Preprocess data and declare columns that are derived from other columns. See the parsers guide for how to use these objects, and the decision parsing guide for deriving columns by asking a decision model.

Parser¶

`pandera.api.parsers.Parser`	Parse a data object for certain properties.
`pandera.api.parsers.ColumnParser`	An object that knows how to produce a column.
`pandera.api.parsers.ParseContext`	Everything a `ColumnParser` knows about the column it fills.

Declared derivation on the column¶

pandera.api.pandas.components.ParsedColumn

A column that declares how it is derived from other columns.

`pandera.api.dataframe.model_components.ParsedField`	Declare a column derived from other columns of the same dataframe.
`pandera.api.dataframe.model_components.ParsedFieldInfo`	A `FieldInfo` that also declares how its column is derived.