[Solved] ENSF592 Assignment 3

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📚 Learning Outcomes

• Accept user input through varied menu options
• Validate user input through exception handling
• Process data according to specifications
• Iterate through varied values using compound data types
• Manipulate strings and apply regular expressions
• Develop and implement user-defined classes
• Print formatted output according to given specifications

💻 Program Specifications

A cipher is an algorithm used for encrypting or decrypting information. You are being asked to design a terminal-based application for encoding and decoding text based on a provided cipher algorithm. Your application must meet the following design specifications:

• Your user interface should prompt the user to input the following information:

1. Whether they would like to encode or decode their text
2. Enter their text to be encoded/decoded
3. Enter their cipher

• You may prompt for the input to be entered in any form or order you like, but be sure to give the user clear instructions.
• You must validate that the provided cipher is exactly 26 elements long and only contains lowercase characters from a to z or digits from 0 to 9.
• If the cipher does not meet the criteria, you must handle a ValueError exception by providing a message back to the user and allow them to re-enter their cipher without terminating the program.
• Any entered string is valid for encoding/decoding, however:
• Any punctuation/spaces/etc. within the text should be removed- only letters are encoded/decoded.
• The resulting coded or decoded message must be all lowercase letters with no spaces in between.
• Your code should include and use at least two classes of your own creation, at least three user-defined functions aside from __init__ or main(), at least one iterable object, and at least one regular expression.
• Your code must follow the conventions discussed so far in the course (nameswithunderscores, ClassNames, four spaces for indentations, spaces between variables/operators, comments throughout, etc.)
• All classes and functions must contain docstring documentation.
• Your code will be run by the TAs as your end user.
• FAQs about the assignment will be answered on the D2L discussion boards. Please check the boards for any clarifications before submitting.
• The grading rubric will be posted to D2L.

Example Tests

Text to be encoded: abcdeCipher: bcdefghijklmnopqrstuvwxyzaCode result: bcdef

Text to be decoded: abcdeCipher: bcdefghijklmnopqrstuvwxyzaCode result: zabcd

Text to be encoded: Tell me and I forget. Teach me and I remember. Involve me and I learn. Benjamin FranklinCipher: bcdefghijklmnopqrstuvwxyzaCode result: ufmmnfboejgpshfuufbdinfboejsfnfncfsjowpmwfnfboejmfbsocfokbnjogsbolmjo

Text to be decoded: uifcftuboenptucfbvujgvmuijohtjouifxpsmedboopucftffopsfwfoupvdifeuifznvtucfgfmuxjuiuififbsuifmfolfmmfsCipher: bcdefghijklmnopqrstuvwxyzaCode result: thebestandmostbeautifulthingsintheworldcannotbeseenoreventouchedtheymustbefeltwiththehearthelenkeller

📝 Assignment Tasks

• Make sure to watch video lessons 8 14 and review the corresponding Jupyter Notebooks and lab sessions.
• Clone this repository to your local computer.
• Open VSCode and start a new terminal. Make sure that your ensf592 environment is activated.
• encryption.py is provided as a starting point. Fill in the header with your own information.
• Remember to test your program execution via the terminal: python encryption.py
• Take a screenshot of your successful program run and upload it to your assignment repository.
• Commit your screenshot and code.
• Push your local git history to github: git push origin main
• Submit your repository HTTPS link to the Assignment 3 D2L dropbox.
• Tip: If you want to learn more about a specific aspect of a Python object, remember to take a look at the official documentation!