webargs

Homepage: https://webargs.readthedocs.io/

webargs is a Python library for parsing and validating HTTP request arguments, with built-in support for popular web frameworks, including Flask, Django, Bottle, Tornado, Pyramid, webapp2, Falcon, and aiohttp.

from flask import Flask
from webargs import fields
from webargs.flaskparser import use_args

app = Flask(__name__)

hello_args = {"name": fields.Str(required=True)}


@app.route("/")
@use_args(hello_args)
def index(args):
    return "Hello " + args["name"]


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

# curl http://localhost:5000/\?name\='World'
# Hello World

pip install -U webargs