From 8d5fa4adbb68cd2106c8a92e7d1a903c4aad4647 Mon Sep 17 00:00:00 2001
From: David Stansby <dstansby@gmail.com>
Date: Mon, 6 Jun 2022 11:03:04 +0100
Subject: [PATCH] Initialise layer list

---
 src/napari_matplotlib/base.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/napari_matplotlib/base.py b/src/napari_matplotlib/base.py
index f3da9081..b4d8c7cf 100644
--- a/src/napari_matplotlib/base.py
+++ b/src/napari_matplotlib/base.py
@@ -1,6 +1,6 @@
 import os
 from pathlib import Path
-from typing import Tuple
+from typing import List, Tuple
 
 import matplotlib as mpl
 import napari
@@ -67,6 +67,7 @@ def __init__(self, napari_viewer: napari.viewer.Viewer):
         self.layout().addWidget(self.canvas)
 
         self.setup_callbacks()
+        self.layers: List[napari.layers.Layer] = []
 
     # Accept any number of input layers by default
     n_layers_input = Interval(None, None)