DataProcessing

Description

This project mimics transactions to allow “all or nothing” updates to databases to prevent dirty writes. For example: For building a money transfer application a transaction woul look like this: When A initiates a transfer of X dollars to B, two things need to happen: - X dollars should be deducted from A’s account - X dollars should be added to B’s account

Features

Key-Value: Keys should be string and values should be integers and creates a new key with the provided value.

Transaction: Provides methods to begin, commit, and rollback transactions.

Error Handling: Ensures invalid operations throw meaningful exceptions.

Isolation: Transactions should not be “visible” to get(), until the transaction is committed.

Setup

1. Clone the repository:

   • git clone (giturl provided)
   • cd your-folder

Running the Code

You can use an online Python interpreter or an IDE with web support to test your code without having Python installed locally. Here are a few easy-to-use options:

Option 1 (Online IDE) - Replit - Visit: https://replit.com/ - Create a new Python project. - Copy and paste your code into the editor with test code. - Run the code directly in the browser.

Option 2: - Install Visual Studio Code Download and install VS Code from https://code.visualstudio.com/. - Open code in Visual Studio Code - Install python extension in extensions tab - Open DataProcess repository from folder - Run DataProcess.py - Adjust main with different inputs as needed

This will run the code and allow you to test it.

Example Test:

# Create database
db = KeyValueDatabase()

# put transaction or throw exception
try:
    db.put("transaction1", 10) 
except Exception as e:print(e)

print(db.get("a"))  # Should print None

# Begin a transaction
db.begin_transaction()
db.put("transaction1", 15)
print(db.get("transaction1"))  # print 15

db.put("transaction2", 10)
print(db.get("transaction2"))  #print 10

# Rollback transaction
db.rollback()
print(db.get("transaction1"))  # Should print None
print(db.get("transaction2"))  # Should print None

# Begin another transaction
db.begin_transaction()
db.put("transaction1", 30)
db.commit()
print(db.get("transaction1"))  # Should print 30

Modifications for Future

- Include more detailed instruction for testing and how the testing should be written for the TAs
- Maybe have a wordcount for readME to know around how detailed it should be
- Include a rubric for code and ReadME