Python: cannot access class attribute from different modules/functions-CodePudding

I have a class called Org, and I'm trying to access its method from multiple functions (that are defined outside of the class). I'm calling main() first, followed by discover_buildings(). The main() executes without error, however, I get AttributeError: 'Org' has no attribute 'headers' error after I call discover_buildings(). What is it that I'm doing wrong? (I was expecting the headers attribute to be shared across the different methods)

class Org(object):

    def __init__(self, client_id, client_secret, grant_type='client_credentials'):
        self.grant_type = grant_type
        self.client_id = client_id
        self.client_secret = client_secret
        self.url = CI_A_URL

    def auth(self):
        """ authenticate with bos """
        params = {
            'client_id': self.client_id,
            'client_secret': self.client_secret,
            'grant_type': self.grant_type
        }
        r = requests.post(self.url   'o/token/', data=params)
        if r.status_code == 200:
            self.access_token = r.json()['access_token']
            self.headers = {
                'Authorization': 'Bearer %s' %self.access_token,
                'Content-Type': 'application/json',
            }
        else:
            logging.error(r.content)
            r.raise_for_status()

    def get_buildings(self, perPage=1000):
        params = {
            'perPage': perPage
        }

        r = requests.get(self.url   'buildings/', params=params, headers=self.headers)
        result = r.json().get('data')
        if r.status_code == 200:
            buildings_dict = {i['name']: i['id'] for i in result}
            sheet_buildings['A1'].value = buildings_dict
        else:
            logging.error(r.content)
            r.raise_for_status()


client_id = 'xxx'
client_secret = 'yyy'
gateway_id = 123
o = Org(client_id, client_secret)

def discover_buildings():
    return o.get_buildings()

def main():
    return o.auth()

Thanks, in advance, for your help!

CodePudding user response：

Try using a property to calculate headers whenever you need it and then cache it.


    def auth(self):
        """ authenticate with bos """
        #