Json 属性错误：'；ActivitiesClient'；对象没有属性'；base_url'；

我知道这是一个回答得很好的问题，但在看了许多问题后，我想不出我做错了什么.

所以我的 playbook 是这样的:

import json

from config import BASE_URL
from utils.request import APIRequest


class ActivitiesClient:
    def __int__(self):
        super().__init__()
        self.base_url = BASE_URL + "Activities"
        self.request = APIRequest()

    def create_activity(self, payload):
        return self.request.post_request(
            self.base_url, json.dumps(payload))

    def get_all_activities(self):
        # return self.request.get_request(self.base_url)
        return APIRequest().get_request(self.base_url)


print(ActivitiesClient().get_all_activities())

从其中我得到了以下错误:

Traceback (most recent call last):
  File "/Users/username/Documents/Pract/APIAutomationProject/services/activities_services.py", line 22, in <module>
    print(ActivitiesClient().get_all_activities())
  File "/Users/username/Documents/Pract/APIAutomationProject/services/activities_services.py", line 19, in get_all_activities
    return APIRequest().get_request(self.base_url)
AttributeError: 'ActivitiesClient' object has no attribute 'base_url'

我犯了一个错误，我问这个，这样我也能理解我的解决方案.