flask regex route

flask_regex_converter.py

from flask import Flask
from werkzeug.routing import BaseConverter

app = Flask(__name__)

class RegExConverter(BaseConverter):
    def __init__(self, map, regex='[^/]+'):
        super().__init__(map)
        self.regex = regex

app.url_map.converters['regex'] = RegExConverter

@app.route('/<regex("[0-9a-f]+"):hex>/')
def example(hex):
    return "hex: %s" % hex


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