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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.

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)
def transform_resource(self, resource):
value = self.get("value")
field_name = self.get("fieldName")
yield from resource.to_petl().update(field_name, value)