Step Guide

The Step concept is a part of the Transform API. You can create a custom Step to be used as part of resource or package transformation.

Step Example

This step uses PETL under the hood.

Python

from frictionless import Step

class cell_set(Step):

code = "cell-set"

def __init__(self, descriptor=None, *, value=None, field_name=None):

self.setinitial("value", value)

self.setinitial("fieldName", field_name)

super().__init__(descriptor)

def transform_resource(self, resource):

value = self.get("value")

field_name = self.get("fieldName")

yield from resource.to_petl().update(field_name, value)