Add keyboard handler snippet.

Author: cztomczak

examples/snippets/keyboard_handler.py

@@ -0,0 +1,19 @@
+from cefpython3 import cefpython as cef
+
+
+def main():
+    cef.Initialize()
+    browser = cef.CreateBrowserSync(url="https://www.google.com/",
+                                    window_title="Keyboard Handler")
+    browser.SetClientHandler(KeyboardHandler())
+    cef.MessageLoop()
+    del browser
+    cef.Shutdown()
+
+
+class KeyboardHandler(object):
+    def OnKeyEvent(self, browser, event, event_handle,  **_):
+        print("OnKeyEvent: "+str(event))
+
+if __name__ == '__main__':
+    main()