add examples and cache examples

app.py

@@ -133,6 +133,16 @@ css = """
         }
 """
 block = gr.Blocks(css=css)
+
+examples = [
+    [
+        'Goku'
+    ],
+    [
+        'Mikasa Ackerman'
+    ],
+]
+
 with block as demo:
     gr.HTML(
         """
@@ -175,6 +185,10 @@ with block as demo:
         gallery = gr.Gallery(label="Generated images", show_label=False, elem_id="generated_id").style(
             grid=[2], height="auto"
         )
+        
+        ex = gr.Examples(examples=examples, fn=infer, inputs=[text], outputs=gallery, cache_examples=True)
+        ex.dataset.headers = [""]
+        
         text.submit(infer, inputs=[text], outputs=gallery)
         btn.click(infer, inputs=[text], outputs=gallery)