Cleanup readme, llava examples, usage examples and nccl init (#1194)

examples/frontend_language/quick_start/gemini_example_multimodal_chat.py

@@ -0,0 +1,30 @@
+"""
+Usage:
+export GCP_PROJECT_ID=******
+python3 gemini_example_multimodal_chat.py
+"""
+
+import sglang as sgl
+
+
+@sgl.function
+def image_qa(s, image_file1, image_file2, question):
+    s += sgl.user(sgl.image(image_file1) + sgl.image(image_file2) + question)
+    s += sgl.assistant(sgl.gen("answer", max_tokens=256))
+
+
+if __name__ == "__main__":
+    sgl.set_default_backend(sgl.VertexAI("gemini-pro-vision"))
+
+    state = image_qa.run(
+        image_file1="./images/cat.jpeg",
+        image_file2="./images/dog.jpeg",
+        question="Describe difference of the two images in one sentence.",
+        stream=True,
+    )
+
+    for out in state.text_iter("answer"):
+        print(out, end="", flush=True)
+    print()
+
+    print(state["answer"])