---
title: "FieldKeyComponents"
description: "API documentation for FieldKeyComponents"
url: https://developer.disguise.one/python-api/docs/fieldkeycomponents/
---

# FieldKeyComponents

Struct to represent a unique pair of layer and its field that is controlled by a Look

See also: [Track & Sequencing Guide](/plugins/guides/track-and-sequencing), [Utility Guide](/plugins/guides/utility)

Base class: _\_BlipValue_

## Properties

#### **fieldName** : _str_

Decorated field name: lowercased, with spaces replaced by underscores

#### **isValid** : _bool_ _(Read-Only)_

Returns true if the object refers to a field belonging to an existing layer

#### **layer** : _[Layer](/python-api/docs/layer#layer)_

Layer resource identifier

## Constructors

#### **\_\_init\_\_**(self, other: _[FieldKeyComponents](/python-api/docs/fieldkeycomponents#fieldkeycomponents)_)

Copy constructor for FieldKeyComponents