Access contents in base class from derived class

 Define the methods inside base class

Call the base class __init__ method from derived class using super().__init__ method

Access the method or values in base class using self. keyword.

Example

from typing import Optional, Dict, List, Tuple, Union

import argparse

class computer:

    def __init__(self,input_args:Optional[List[str]]):

        #self.a=a

        #self.b=b

        #self.c=c

        #print(f'base class {a}')

        #print(f'base class  {b}')

        #print(f'base class {c}')

        #self.add(self.a,self.b)

        self._parse_arguments(input_args)

    #def add (self,a,b) :

        #print(a+b)   

    def _parse_arguments(self,input_args:Optional[List[str]]):

        parser = argparse.ArgumentParser(

        prog=' Processing Job',

        description='Run a  processing job',

        epilog='Contact xxx@riotinto.com for more information.'

        )

        parser.add_argument('-dm', '--data_movement_id',

                            required=True, type=int, help='The DataMovementId')

        parser.add_argument('-b', '--batch_id', required=True,

                            type=int, help='The BatchId')

        parser.add_argument('-s', '--support_db', required=True,

                            help='The name of the linked service to ')

        if input_args is None:

            args = parser.parse_args()

        else:

            args = parser.parse_args(input_args)

        self._batch_id = args.batch_id

        self._data_movement_id = args.data_movement_id

        self._support_db_ls_name = args.support_db

        #print(self._batch_id,self._data_movement_id,self._support_db_ls_name)

class memory(computer):

    

    def __init__(self,*args):

        print('derived') 

        

        super().__init__(*args) 

        print(self._batch_id,self._data_movement_id,self._support_db_ls_name)

data_movement_id = 100000000000002         

m=memory(f"-dm {data_movement_id} -b 100000000000145 -s LS_ASQL_SUPPORT_DB".split())