Fix mypy errors

ipywatch/ipywatch.py

@@ -4,7 +4,7 @@
 __all__ = ['WidgetStateHistoryListener', 'Ipywatch']
 
 # %% ../nbs/03_ipywatch.ipynb 3
-from typing import Any, Callable
+from typing import Any, Callable, Optional
 
 import ipywidgets
 from comm.base_comm import BaseComm
@@ -16,9 +16,9 @@
 # %% ../nbs/03_ipywatch.ipynb 4
 class WidgetStateHistoryListener:
     def __init__(
-        self, 
-        history_size: int = 5, 
-        on_state_change: Callable[[ipywidgets.Widget, Any], None]=None
+        self,
+        history_size: int = 5,
+        on_state_change: Optional[Callable[[ipywidgets.Widget, Any], None]] = None
     ):
         self.history_size = history_size
         self.history = WidgetStateHistory(history_size)

mypy.ini

@@ -1,2 +1,2 @@
 [mypy]
-method_assign=False
+ignore_missing_imports = True

nbs/01_reacton.ipynb

@@ -50,7 +50,7 @@
     "    \n",
     "    _original_render(self, element, container)\n",
     "\n",
-    "_RenderContext.render = _patched_render"
+    "_RenderContext.render = _patched_render  # type: ignore"
    ]
   },
   {

nbs/03_ipywatch.ipynb

@@ -34,7 +34,7 @@
    "outputs": [],
    "source": [
     "#| exporti\n",
-    "from typing import Any, Callable\n",
+    "from typing import Any, Callable, Optional\n",
     "\n",
     "import ipywidgets\n",
     "from comm.base_comm import BaseComm\n",
@@ -54,9 +54,9 @@
     "#| export\n",
     "class WidgetStateHistoryListener:\n",
     "    def __init__(\n",
-    "        self, \n",
-    "        history_size: int = 5, \n",
-    "        on_state_change: Callable[[ipywidgets.Widget, Any], None]=None\n",
+    "        self,\n",
+    "        history_size: int = 5,\n",
+    "        on_state_change: Optional[Callable[[ipywidgets.Widget, Any], None]] = None\n",
     "    ):\n",
     "        self.history_size = history_size\n",
     "        self.history = WidgetStateHistory(history_size)\n",