Handle unknown keys

SarahCosmosys · gvalkov · commit 05fd3fa3cae8 · 2020-01-12T00:00:50.000+01:00
Add to the `keys` dictionary when an unknown key is pressed.
diff --git a/evdev/events.py b/evdev/events.py
@@ -94,7 +94,9 @@ def __init__(self, event):
         elif event.value == 1:
             self.keystate = KeyEvent.key_down
 
-        self.keycode  = keys[event.code]  # :todo:
+        if not (event.code in keys):
+            keys[event.code] = ''.join('{:02X}'.format(event.code))
+        self.keycode = keys[event.code]
         self.scancode = event.code
 
         #: Reference to an :class:`InputEvent` instance.
