Step
A single validation step in a Contract, defined declaratively.
Usage
Step()This is the declarative equivalent of calling a validation method on Validate. Steps are stored as data and compiled into Validate method calls at enforcement time.
Parameters
method: str-
The validation method name (e.g., “col_vals_gt”, “rows_distinct”).
**kwargs: Any- All parameters that would be passed to the corresponding Validate method.
Examples
import pointblank as pb
# A step that checks column values are greater than 0
step = pb.Step("col_vals_gt", columns="amount", value=0)
# A step that checks rows are distinct by a key column
step = pb.Step("rows_distinct", columns=["order_id"])
# A step that checks a regex pattern
step = pb.Step("col_vals_regex", columns="email", pattern=r"^[^@]+@[^@]+\.[^@]+$")Methods
| Name | Description |
|---|---|
| from_dict() | Construct a Step from a dictionary (e.g., parsed from YAML). |
| to_dict() | Serialize the Step to a dictionary for YAML/JSON export. |
from_dict()
Construct a Step from a dictionary (e.g., parsed from YAML).
Usage
from_dict(data)Parameters
data: dict[str, Any]- A dictionary with a single key (the method name) mapping to its kwargs dict.
Returns
Step- A new Step instance.
to_dict()
Serialize the Step to a dictionary for YAML/JSON export.
Usage
to_dict()Returns
dict- A dictionary representation of this step.