reflection method:

# -*- coding: UTF-8 -*-
import requests
        

class TP_handler:
    def __init__(self, token, timeout=500):
        self.__header = {
           'APIToken': token,
           'Content-Type': 'application/json;charset=UTF-8'
        }
        self.__api = {
            'cn': 'https://api.xxxxxxxxx.cn/',
            'us': 'https://api.xxxxxxxxx.com/'
        }
        self.route = 'cn'
        self.timeout = timeout
        self.__funcs = {
            "download_order": ('OrderNotification', 'GET'),
            "update_order": ('OrderNotification', 'PUSH'),
            "create_order": ('OrderNotification', 'POST')
        }
    
    def add_api(self, func):
        self.__funcs.update(func)
    
    def __get_api(self, route, interface):
        api = self.__api.get(route, None)
        if api is None:
            raise Exception('Unknown Route: {}'.format(route))
        return api + interface
        
    def __getattr__(self, attr):
        def func(*args, **kwargs):
            print(attr, args, kwargs)
            funcs = self.__funcs.get(attr, None)
            if funcs is None:
                print('Unknown Method')
            else:
                interface = funcs[0]
                route = kwargs.get('route', self.route)
                api = self.__get_api(route, interface)
                headers = kwargs.get('headers', self.__header)
                timeout = kwargs.get('timeout', self.timeout)
                data = kwargs.get('data', None)
                params = kwargs.get('params', None)
                res = requests.request(method=funcs[1], url=api, headers=headers, timeout=timeout, data=data, params=params)
                res.encoding = 'utf-8'
                return res.json()
        return func
  
        
if __name__ == '__main__':
    m = TP_handler('e7d82e9-a837')
    params = {
        'OrderId': '113-8302-60798',
        'PageSize': 10,
        'PageNumber': 1
    }
    n = m.download_order(params=params)
    print(n)