python - pyhton 클래스 함수에서 'str'객체를 호출 할 수 없음

Page class 가있는 webscrapper를 만들고 있습니다 . 그러나 url 속성을 지정할 때 다음 오류 메시지가 나타납니다.   Page class 에 .

TypeError: 'str' object is not callable

내 코드 아래에서 찾기 :

class Page:
    def __init__(self, pid, cur_id, url=None, proxy=None):
        self.pid = pid
        self.cur_id = cur_id
        if url is None:
            self.url = self._build_url()
        else:
            self.url = url
        self.content = get_page_content(self.url, proxy)
        self.crawl_date = datetime.now()
    @property
    def _build_url(self):
        my_url = root + self.pid
        return my_url

어떤 제안?

수정 : 전체 역 추적 :

> Traceback (most recent call last):   File "C:\Program
> Files\JetBrains\PyCharm Community Edition
> 2019.1.3\helpers\pydev\pydevd.py", line 2060, in <module>
>     main()   File "C:\Program Files\JetBrains\PyCharm Community Edition 2019.1.3\helpers\pydev\pydevd.py", line 2054, in main
>     globals = debugger.run(setup['file'], None, None, is_module)   File "C:\Program Files\JetBrains\PyCharm Community Edition
> 2019.1.3\helpers\pydev\pydevd.py", line 1405, in run
>     return self._exec(is_module, entry_point_fn, module_name, file, globals, locals)   File "C:\Program Files\JetBrains\PyCharm Community
> Edition 2019.1.3\helpers\pydev\pydevd.py", line 1412, in _exec
>     pydev_imports.execfile(file, globals, locals)  # execute the script   File "C:\Program Files\JetBrains\PyCharm Community Edition
> 2019.1.3\helpers\pydev\_pydev_imps\_pydev_execfile.py", line 18, in execfile
>     exec(compile(contents+"\n", file, 'exec'), glob, loc)   File "C:/single_offers.py",
> line 146, in <module>
>     main()   File "C:/single_offers.py",
> line 68, in main
>     p = Page(id, cur_id, proxy=proxy)   File "C:/single_offers.py",
> line 109, in __init__
>     self.url = self._build_url() TypeError: 'str' object is not callable
> 
> Process finished with exit code 1