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Create A Stamp Selling Program in The Python Assignment Solution

July 01, 2024
Dr. Victoria Campbell
Dr. Victoria
🇬🇧 United Kingdom
Python
Dr. Victoria Campbell holds a Ph.D. in Computer Science from a leading university in the UK and has completed over 800 assignments related to Python file handling. With a passion for teaching and research, Dr. Campbell specializes in complex data manipulation, optimization algorithms, and machine learning applications in Python. Her expertise includes text file parsing, CSV data processing, and implementing advanced error handling mechanisms.
Key Topics
  • Instructions
    • Objective
  • Requirements and Specifications
Tip of the day
Use the REPL (Read-Eval-Print Loop) to test your code interactively, and practice writing concise, readable expressions to harness Scala’s powerful syntax effectively.
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Instructions

Objective

Write a python assignment program to create a stamp selling system.

Requirements and Specifications

Create-a-stamp-selling-program-in-python
Create-a-stamp-selling-program-in-python 1
Create-a-stamp-selling-program-in-python 2

Source Code

STUDENT_ID = 28211718 def encrypt(plain): key = STUDENT_ID % 128 encrypted = '' for c in plain: encrypted += chr(ord(c) + key) return encrypted def decrypt(data): key = STUDENT_ID % 128 decrypted = '' for c in data: decrypted += chr(ord(c) - key) return decrypted def get_users(): filename = 'user_details.txt' try: f = open(filename, 'r') return f.read().splitlines() except: return [] def login(user, password): return encrypt(user + ':' + password) in get_users() print(login('user', '1234'))

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