input docs an exampels

docs/examples/guide/input/key01.py

@@ -0,0 +1,21 @@
+from textual.app import App, ComposeResult
+from textual.widgets import TextLog
+from textual import events
+
+
+class InputApp(App):
+    """App to display key events."""
+
+    def compose(self) -> ComposeResult:
+        yield TextLog()
+
+    def on_key(self, event: events.Key) -> None:
+        self.query_one(TextLog).write(event)
+
+    def key_space(self) -> None:
+        self.bell()
+
+
+if __name__ == "__main__":
+    app = InputApp()
+    app.run()