Decorator.py

class Filters(object):
    def __init__(self, types=[], query=None):
        self.types = types
        self.query = query

    def __call__(self, *args, **kwargs):
        for type in self.types:
            try:
                func = getattr(Filters, type)
            except AttributeError:
                print ('function not found')
            else:
                func(object, self.query)

    def filter(self, query):
        with app.app_context():
            from flask import request
            filters, err = FilterParameter.generate(PlayerSchema, request.args)

            query = FilterParameter.filter_core_by(query, filters)


@Filters(['filter'], select([Login.id, Login.login]))
@app.route('/players', methods=['GET'])
def players(result):

    return PlayerSchema(many=True).dump(result).data