Optimizing Python Web APIs snippet 1.py

from flask import Flask
from background import data_valid, process
app = Flask(__name__)

@app.route("/")
def hello():

    data = request.args.to_dict()

    if data_valid(data):
        # run a time consuming task
        process(data)
        return ("", 200)

    else:
      return ("data invalid", 400)

if __name__ == "__main__":
    app.run()