Steps

A reusable collection of validation step definitions.

Usage

Source

Steps(steps=None)

A Steps object records validation steps without binding them to data, thresholds, or metadata. It mirrors the validation method API on Validate so that defining steps feels identical, but the result is a portable recipe that can be imported into any number of pipelines via Validate.add_steps().

Parameters

steps: list[Step] | None = None

An optional list of Step objects to initialize with.

Examples

import pointblank as pb

completeness = (
    pb.Steps()
    .col_vals_not_null(columns=pb.ends_with("_id"))
    .col_vals_not_null(columns="email")
)

positive_amounts = (
    pb.Steps()
    .col_vals_ge(columns=pb.starts_with("amt_"), value=0)
    .col_vals_gt(columns="amt_total", value=0)
)

validation = (
    pb.Validate(data=orders, label="Order quality")
    .add_steps(completeness, positive_amounts)
    .interrogate()
)