# NodeBox

Create visual output with Python programming code
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# photobot.Canvas.layers[]

## Syntax

    canvas.layers[index]

## Description

The list of all layers in the canvas. Layers can be retrieved by index, or by name. Indices start at 1, so the lowest layer is canvas.layers[1], the layer above canvas.layers[2] and so on.

The bottom canvas.layers[0] is reserved for the transparent background and must remain untouched.

## Example

Retrieves the layer named robot.

    photobot = ximport("photobot")
    canvas = photobot.canvas(100, 100)
    canvas.layer("images/robot.jpg", name="robot")
    print canvas.layers["robot"].index()
    >>>1