Create a file named inventory.py. a. Define a class named Inventory. a. Define a member function named_init_ to meet the following requirements: a. Take a self object as a positional parameter. b. Take a filename string as a keyword parameter. c. Define a self.data instance variable to hold the dictionary. d. Open the filename JSON file, if it exists and contains data, assign the JSON deserialized data (a dictionary) to self.data, otherwise cleanly handle the error. b. Define a member function named add_item to meet the following requirements: a. Take a self object as a positional parameter. b. Take a barcode string as a keyword parameter. Return an integer value of 109 if the value of the barcode does not meet the required format identified in the dictionary structure above. Return an integer value of 101 if the barcode already exists in the dictionary. c. Take a description string as a keyword parameter. d. Add the item to the dictionary by setting the dictionary key to barcode and the value to the list made up of the description and the quantity of zero. e. Write the updated dictionary to the filename provided in the __init___ function. f. Return an integer value of 100 for a successful add. c. Define a member function named modify_description to meet the following requirements: a. Take a self object as a positional parameter. b. Take a barcode string as a keyword parameter. Return an integer value of 102 if the barcode does not exist in the dictionary. c. Take a description string as a keyword parameter. d. Update the item in the dictionary by setting the dictionary key to barcode and the value to the list made up of the description and the existing quantity (i.e the quantity should not change). e. Write the updated dictionary to the filename provided in the __init___ function. f. Return an integer value of 100 for a successful add. d. Define a member function named add_qty to meet the following requirements: a. Take a self object as a positional parameter. b. Take a barcode string as a keyword parameter. Return an integer value of 102 if the barcode does not exist in the dictionary. c. Take a qty integer as a keyword parameter. Return an integer value of 108 if the value of the qty does not meet the required format identified in the dictionary structure above (i.e. an integer). d. Update the item in the dictionary by setting the dictionary key to barcode and the value to the list made up of the existing description and the existing quantity plus qty. e. Write the updated dictionary to the filename provided in the __init___ function. f. Return an integer value of 100 for a successful add. e. Define a member function named remove_qty to meet the following requirements: a. Take a self object as a positional parameter. b. Take a barcode string as a keyword parameter. Return an integer value of 102 if the barcode does not exist in the dictionary. c. Take a qty integer as a keyword parameter. Return an integer value of 108 if the value of the qty does not meet the required format identified in the dictionary structure above (i.e. an integer). d. Return an integer value of 103 if the value of the qty is greater than the existing quantity in inventory. e. Update the item in the dictionary by setting the dictionary key to barcode and the value to the list made up of the existing description and the existing quantity minus qty. f. Write the updated dictionary to the filename provided in the __init____ function. g. Return an integer value of 100 for a successful add. f. Define a member function named get_inventory to meet the following requirements: a. Take a self object as a positional parameter. b. Return a formatted string that contains all the items in the dictionary, each on a separate line. The format should allow 8 characters for the barcode, 20 characters for the description, and 5 characters for the quantity, indicated as follows (note: the top line is for illustrative purposes only and should not be included in the return string): |--8--||----20▬▬▬▬▬▬▬▬▬▬▬▬||-5-| BC9001 Paper BC9034 Notebook. BC9026 Computer BC9072 Pencil 173 84 7 21