git config --global user.name "Your Name"
git config --global user.email "you@example.com"
mkdir notes-app && cd notes-app
git init
git status
git add .
git commit -m "Start notes app"
git log --oneline

# pip install flask
from flask import Flask, render_template_string

app = Flask(__name__)

@app.get("/")
def home():
    return render_template_string("<h1>Notes</h1><p>{{ count }} notes saved</p>", count=0)

if __name__ == "__main__":
    app.run(debug=True)

python -m venv .venv
source .venv/bin/activate          # Windows: .venv\Scripts\activate
pip install flask
pip freeze > requirements.txt

# .gitignore
.venv/
__pycache__/
*.pyc
.env
instance/

git add .gitignore requirements.txt app.py
git commit -m "Initialise Flask project"

from flask import Flask, request, redirect, url_for, render_template_string

app = Flask(__name__)
notes = []

PAGE = """
<h1>Notes</h1>
<form method="post"><input name="text" required><button>Add</button></form>
<ul>{% for n in notes %}<li>{{ n }}</li>{% endfor %}</ul>
"""

@app.route("/", methods=["GET", "POST"])
def home():
    if request.method == "POST":
        text = request.form.get("text", "").strip()
        if text:
            notes.append(text)
        return redirect(url_for("home"))
    return render_template_string(PAGE, notes=notes)

git switch -c add-search
# ...edit app.py and templates...
git add app.py templates/
git commit -m "Add search to notes list"
git push -u origin add-search
# Open a pull request on GitHub, address review comments, then merge.
git switch main
git pull

# test_app.py
from app import app

def test_home_loads():
    client = app.test_client()
    assert client.get("/").status_code == 200

# .github/workflows/tests.yml
# name: tests
# on: [push, pull_request]
# jobs:
#   test:
#     runs-on: ubuntu-latest
#     steps:
#       - uses: actions/checkout@v4
#       - uses: actions/setup-python@v5
#         with: { python-version: "3.12" }
#       - run: pip install -r requirements.txt pytest
#       - run: pytest

Days 1-3:   Git basics — init, add, commit, log, push; GitHub profile
Days 4-7:   Python refresh, virtual environments, Flask hello world
Week 2:     Routes, forms, templates, a small database (SQLite)
Week 3:     Branches and pull requests, pytest, GitHub Actions, README

After every working change:
1. git status
2. git diff          — review what changed
3. git add <files>
4. git commit -m "Verb + what changed"
5. git push
Good messages: "Add note form", "Fix empty note bug", "Add search route"

# Notes App (Flask)
A small notes app built with Flask.

## Run locally
python -m venv .venv && source .venv/bin/activate
pip install -r requirements.txt
flask --app app run --debug

## Tests
pytest

## What I learned
- Flask routes, forms and templates
- Git branches and pull requests