Hey If anyone is familiar with APIs I

import os
from flask import request
from llama_index import SimpleDirectoryReader, VectorStoreIndex, StorageContext

# NOTE: for local testing only, do NOT deploy with your key hardcoded
os.environ['OPENAI_API_KEY'] = "your key here"

index = None
index_dir = "./index_data"  # specify the directory where you want to store the index

def initialize_index():
    global index
    storage_context = StorageContext.from_defaults()
    if os.path.exists(index_dir):
        index = load_index_from_storage(storage_context)
    else:
        documents = SimpleDirectoryReader("./documents").load_data()
        index = VectorStoreIndex.from_documents(documents, storage_context=storage_context)
        storage_context.persist(index_dir)


@app.route("/query", methods=["GET"])
def query_index():
  global index
  query_text = request.args.get("text", None)
  if query_text is None:
    return "No text found, please include a ?text=blah parameter in the URL", 400
  query_engine = index.as_query_engine()
  response = query_engine.query(query_text)
  return str(response), 200

def main():
    initialize_index()

if __name__ == "__main__":
    main()

@app.route("/index", methods=["GET"])
def initialize_index():
    global index
    dossier = request.args.get("dossier", None)
    if dossier is None:
        dossier = "data"
    if os.path.exists("./storage"):
        storage_context = StorageContext.from_defaults(persist_dir="./storage")
        index = load_index_from_storage(storage_context, service_context=service_context)
        print((f"Finished loading doc n°1 index from storage with {len(index.docstore.docs)} nodes"))
    else:
        documents = SimpleDirectoryReader(f"./{dossier}").load_data()
        print((f"Loaded doc n°1 with {len(documents)} pages"))
        index = GPTVectorStoreIndex.from_documents(documents, service_context=service_context)
        index.storage_context.persist(persist_dir="./storage")
        print((f"Finished building doc n°1 index with {len(index.docstore.docs)} nodes"))
    
    return "Index initialized successfully", 200