init_client.py

    def assumeRole(self, action):
        client = self.initStsClient()

        assumedRoleObject = client.assume_role(
        RoleArn="arn:aws:iam::"+self.aws_accounts[self.env]["id"]+":role/"+self.aws_accounts[self.env]["role"],
        RoleSessionName="Drp-" + action
            )

        credentials=assumedRoleObject['Credentials']

        ACCESS_KEY=credentials.get("AccessKeyId")
        SECRET_KEY=credentials.get("SecretAccessKey")
        SESSION_TOKEN=credentials.get("SessionToken")
        
        return ACCESS_KEY, SECRET_KEY, SESSION_TOKEN

    def initeASGClient(self, action):
        '''
        DOCSTRING: Return the autoscaling client
        INPUT: None
        OUTPUT: boto3.client('autoscaling')
        '''
        ACCESS_KEY, SECRET_KEY, SESSION_TOKEN = self.assumeRole(action)
        self.logger.debug('Launching asg client with role %s on the account %s', self.aws_accounts[self.env]["role"], self.aws_accounts[self.env]["id"])
        return boto3.Session(
            region_name=self.aws_accounts[self.env]["region"],
            aws_access_key_id=ACCESS_KEY,
            aws_secret_access_key=SECRET_KEY,
            aws_session_token=SESSION_TOKEN
        ).client('autoscaling')
      
    def describeASG(self):
        '''
        DOCSTRING: List available ASGs
        INPUT: None
        OUTPUT: ASGs available
        '''
        # Client init
        client = self.initeASGClient("DescribeASG")
        return client.describe_auto_scaling_groups()['AutoScalingGroups']