feat: example for voyage query engine pack (#880)

llama_hub/llama_packs/voyage_query_engine/example.py

@@ -0,0 +1,21 @@
+# Required Environment Variables: OPENAI_API_KEY, VOYAGE_API_KEY
+
+from pathlib import Path
+from llama_index import download_loader
+from llama_index.llama_pack import download_llama_pack
+
+# download and install dependencies
+VoyageQueryEnginePack = download_llama_pack("VoyageQueryEnginePack", "./voyage_pack")
+PDFReader = download_loader("PDFReader")
+
+# load documents
+loader = PDFReader()
+document_path = Path("./data/101.pdf")  # replace with your own document
+documents = loader.load_data(file=document_path)
+
+# create the pack
+voyage_pack = VoyageQueryEnginePack(documents)
+
+# run the pack
+response = voyage_pack.run("How to rewrite history?", similarity_top_k=2)
+print(response)