release initial code

Co-authored-by: Ying Sheng <sqy1415@gmail.com>
Co-authored-by: Liangsheng Yin <hnyls2002@gmail.com>
Co-authored-by: Zhiqiang Xie <xiezhq@stanford.edu>
Co-authored-by: parasol-aser <3848358+parasol-aser@users.noreply.github.com>
Co-authored-by: LiviaSun <33578456+ChuyueSun@users.noreply.github.com>
Co-authored-by: Cody Yu <hao.yu.cody@gmail.com>

examples/quick_start/anthropic_example_complete.py

@@ -0,0 +1,26 @@
+from sglang import function, gen, set_default_backend, Anthropic
+
+
+@function
+def few_shot_qa(s, question):
+    s += (
+"""
+\n\nHuman: What is the capital of France?
+\n\nAssistant: Paris
+\n\nHuman: What is the capital of Germany?
+\n\nAssistant: Berlin
+\n\nHuman: What is the capital of Italy?
+\n\nAssistant: Rome
+""")
+    s += "\n\nHuman: " + question + "\n"
+    s += "\n\nAssistant:" + gen("answer", stop="\n", temperature=0)
+
+
+set_default_backend(Anthropic("claude-2"))
+
+state = few_shot_qa.run(question="What is the capital of the United States?")
+answer = state["answer"].strip().lower()
+
+assert "washington" in answer, f"answer: {state['answer']}"
+
+print(state.text())