Gen-AI Developer Classroom notes 11/Oct/2025

UV

• Refer Here for uv installation
• Creating python projects using uv and adding dependencies
• create a directory

mkdir library_management
cd library_management

• create a project using command

uv init --package .

unit testing – pytest

• Lets add pytest to the project
• After activating virtual environment

pip install pytest

• with uv

uv add --dev pytest

Creating a project with unit testing enabled

• Create a new directory math_learning and cd into it

mkdir math_learning
cd math_learning

• lets create a python package

uv init --package .

• Now open vscode

code .

* open pyproject.toml file and change the version and description
* lets create a virtual environment

uv venv .venv
# or
uv sync

• Activate virtual environment in terminal

# for windows
.\.venv\Scripts\activate


# for mac or linux
source .venv/bin/activate

• Now select interpreter in vscode Ctrl+Shift+p => python: Select Interpreter
  

• Now lets add pytest as dev depenency

uv add --dev pytest

• Add the following section to the pyproject.toml

[tool.pytest.ini_options]
minversion = "7.0"
addopts = "-ra -q"
testpaths = [
    "tests"
]

• After this run uv run pytest where you should see some warnings.
• Create the tests folder uv run pytest
• Create a python mymodule my_math.py with simple add function

def add(a: int, b: int) -> int:
    return a + b

• Now add a file in tests folder with with name test_mymath.py

Lets work on library management system

• lets call this as lms

Persistence

• To store the data we can use
  • files: files come in various extensions (csv, json, yaml) and forms (binary/text)
  • databases

Learning how to persist the data (read/write) from files

• Python file operations

context managers in python

• Refer Here

Exceptions and Errors

• Refer Here for tutorial and Refer Here for exception handling and Refer Here for custom exceptions

• We need to

  • handle exceptions
    • handling exceptions
  • raise exceptions
    • Creating Custom Exceptions

• Handling exceptions: this is done with try catch finally blocks

• Refer Here the notebook.