dp1_factory_pattern.py

import json 
import xml.etree.ElementTree as etree


class JSONDataExtractor:
    def __init__(self, filepath):
        self.data = dict()
        with open(file=filepath, mode='r', encoding='utf-8') as fp:
            self.data = json.load(fp)

    @property
    def parsed_data(self):
        return self.data

    def print_data(self):
        print('\nJSON:')
        for each_doc in self.data:
            for k, v in each_doc.items():
                print(f'{k.capitalize()} is {v}')
            print('')
        return None

class XMLDataExtrator: 
    def __init__(self, filepath):
        self.tree = etree.parse(filepath)

    @property
    def parsed_data(self):
        return self.tree

    def print_data(self):
        xml_data = self.tree.findall(f".//person")
        print('\nXML:')
        for each in xml_data:
            print(f"FirstName: {each.find('firstName').text}")
            print(f"LastName: {each.find('lastName').text}")
            # for each_phone in each.find('phoneNumber'):
            #     print(f"PhoneNumber ({each_phone.attrib['type']}): {each_phone.text}")
            [print(f"PhoneNumber ({each_phone.attrib['type']}): {each_phone.text}") for each_phone in each.find('phoneNumbers')]
            print('')

class DataExtractorFactory:
    def __init__(self, filepath):
        self.__obj = None
        self.__filepath = str(filepath)
        self.__extract_data_from()

    def __new__(cls, filepath):
        # instance = super(DataExtractorFactory, cls).__new__(cls)
        instance = object.__new__(cls)
        instance.__init__(filepath)
        return instance.__obj

    def __extract_data_from(self):
        try:
            self.__obj = self.__data_extractor_factory()
        except ValueError as e:
            print(f'{e}')

    def __data_extractor_factory(self):
        if self.__filepath.endswith('json'): 
            extractor = JSONDataExtractor
        elif self.__filepath.endswith('xml'):
            extractor = XMLDataExtrator
        else:
            raise ValueError(f'Data extraction for the given file {self.__filepath} is not supported..!')
        return extractor(self.__filepath)

def main():
    # pylint: disable=no-member
    print('SQLite')
    sqlite_factory = DataExtractorFactory(filepath='./person.sq3')
    print(sqlite_factory)
    print('')

    json_factory = DataExtractorFactory(filepath='./movies.json')
    json_factory.print_data()

             
if __name__ == "__main__":
    main()

movies.json

[
 {"title":"After Dark in Central Park",
  "year":1900, 
  "director":null, "cast":null, "genre":null},
 {"title":"Boarding School Girls' Pajama Parade",
  "year":1900, 
  "director":null, "cast":null, "genre":null},
 {"title":"Buffalo Bill's Wild West Parad",
  "year":1900, 
  "director":null, "cast":null, "genre":null},
 {"title":"Caught",
  "year":1900, 
  "director":null, "cast":null, "genre":null},
 {"title":"Clowns Spinning Hats",
  "year":1900, 
  "director":null, "cast":null, "genre":null},
{"title":"Capture of Boer Battery by British",
  "year":1900, 
  "director":"James H. White", "cast":null, "genre":"Short documentary"},
 {"title":"The Enchanted Drawing",
  "year":1900, 
  "director":"J. Stuart Blackton", "cast":null,"genre":null},
 {"title":"Family Troubles",
  "year":1900,
  "director":null, "cast":null, "genre":null},
 {"title":"Feeding Sea Lions",
  "year":1900,
  "director":null, "cast":"Paul Boyton", "genre":null}
 ]