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.

Programming Logic & Design Comprehensive
9th Edition
ISBN:9781337669405
Author:FARRELL
Publisher:FARRELL
Chapter7: File Handling And Applications
Section: Chapter Questions
Problem 1GZ
icon
Related questions
Question

Please help me code this in Python

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.
Transcribed Image Text: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.
Expert Solution
steps

Step by step

Solved in 3 steps with 1 images

Blurred answer
Knowledge Booster
File Input and Output Operations
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Programming Logic & Design Comprehensive
Programming Logic & Design Comprehensive
Computer Science
ISBN:
9781337669405
Author:
FARRELL
Publisher:
Cengage
C++ for Engineers and Scientists
C++ for Engineers and Scientists
Computer Science
ISBN:
9781133187844
Author:
Bronson, Gary J.
Publisher:
Course Technology Ptr