Binary Bit Manipulation Challenge
You're writing security software that needs to encrypt data using bitwise operations. Create a program that demonstrates how to manipulate individual bits in a byte of data.
Hints
- Research Python's bitwise operators: & (AND), | (OR), ^ (XOR), ~ (NOT), << (left - shift), >> (right shift)
- To flip a specific bit, use the XOR operator with a value that has only that bit - set
- Visualise the binary representations at each step to understand what's happening
- Challenge: Add a function that rotates bits left or right in a circular pattern
Boilerplate code has been provided for you. Complete the functions and add tests to ensure your program works as expected.
How to Test
Here is how to test you code manually. At the datatypes/ $ prompt in your terminal: :
-
Run your program with
python security.py. Check that the default values in the program are correctly encrypted and decrypted. -
Add additional values to check if the code works. Sometimes it is easier to start with a small number as you can desk check your work.
Pytest
You can execute the below to check your code using pytest from the root directory.
A green output from running the test means it was successful. A red output means there is a bug in your code that you need to fix.
How to Submit
From github desktop or the command line, commit your changes and push them to your repository.
Codespaces
If you are using codespaces, you can commit your changes directly from the Codespace interface. Click on the Source Control icon in the left sidebar, then click on the "..." button and select "Commit to main". Enter a commit message and click "Commit".
Codespace terminal or your local terminal.
Note
You will need to have installed git-scm for this to work locally
At the /datatypes/security $ prompt in your terminal: