Validation

Schema.validate(df, /, *[, cast, eager])	Validate that a data frame satisfies the schema.
Schema.filter(df, /, *[, cast, eager])	Filter the data frame by the rules of this schema.
Schema.is_valid(df, /, *[, cast])	Check whether a data frame satisfies the schema.
Schema.cast(df, /)	Cast a data frame to match the schema.
rule(*[, group_by])	Mark a function as a rule to evaluate during validation.