fix: key error if widgets is missing state

seeM · seeM · commit 309f2b56abda · 2022-11-08T13:18:09.000+02:00
fixes #1167
diff --git a/nbdev/processors.py b/nbdev/processors.py
@@ -211,7 +211,7 @@ def end(self):
             mimetype = 'application/vnd.jupyter.widget-state+json'
             old = nested_idx(self.nb.metadata, 'widgets', mimetype) or {'state': {}}
             new = Widget.get_manager_state(drop_defaults=True)
-            widgets = {**old, **new, 'state': {**old['state'], **new['state']}}
+            widgets = {**old, **new, 'state': {**old.get('state', {}), **new['state']}}
             self.nb.metadata['widgets'] = {mimetype: widgets}
 
 # %% ../nbs/api/processors.ipynb 42
diff --git a/nbs/api/processors.ipynb b/nbs/api/processors.ipynb
@@ -609,7 +609,7 @@
     "            mimetype = 'application/vnd.jupyter.widget-state+json'\n",
     "            old = nested_idx(self.nb.metadata, 'widgets', mimetype) or {'state': {}}\n",
     "            new = Widget.get_manager_state(drop_defaults=True)\n",
-    "            widgets = {**old, **new, 'state': {**old['state'], **new['state']}}\n",
+    "            widgets = {**old, **new, 'state': {**old.get('state', {}), **new['state']}}\n",
     "            self.nb.metadata['widgets'] = {mimetype: widgets}"
    ]
   },

Original file line number	Diff line number	Diff line change
`@@ -609,7 +609,7 @@`
`609`	`609`	`" mimetype = 'application/vnd.jupyter.widget-state+json'\n",`
`610`	`610`	`" old = nested_idx(self.nb.metadata, 'widgets', mimetype) or {'state': {}}\n",`
`611`	`611`	`" new = Widget.get_manager_state(drop_defaults=True)\n",`
`612`		`- " widgets = {old, new, 'state': {old['state'], new['state']}}\n",`
	`612`	`+ " widgets = {old, new, 'state': {old.get('state', {}), new['state']}}\n",`
`613`	`613`	`" self.nb.metadata['widgets'] = {mimetype: widgets}"`
`614`	`614`	`]`
`615`	`615`	`},`