Fix Week 2 SQLite demo database path and add 'which is my database?' comment

.gitignore

@@ -4,3 +4,4 @@ __pycache__/
 *.pyc
 app.db
 auth.db
+university.db

class-2/week2-sqlite/main.py

@@ -0,0 +1,39 @@
+from fastapi import FastAPI
+from pathlib import Path
+import sqlite3
+
+app = FastAPI()
+
+
+# Check where you are connecting! Ask yourself: "Which one is my database?"
+# The students table lives in university.db, created in Part 1 by setup_students.sql.
+# Careful: sqlite3.connect() silently CREATES an empty file if this path does not
+# exist, so a wrong filename shows up later as "no such table", not "file not found".
+DB_PATH = Path(__file__).parent / "university.db"
+
+
+def get_connection():
+    connection = sqlite3.connect(DB_PATH)
+    connection.row_factory = sqlite3.Row
+
+    return connection
+
+
+@app.get("/")
+def home():
+    return {"message": "University API is running"}
+
+
+@app.get("/students")
+def get_students():
+    connection = get_connection()
+
+    try:
+        cursor = connection.cursor()
+        cursor.execute("select * from students")
+        students = cursor.fetchall()
+
+    finally:
+        connection.close()
+
+    return students

class-2/week2-sqlite/requirements.txt

@@ -0,0 +1,2 @@
+fastapi==0.141.1
+uvicorn==0.52.4

class-2/week2-sqlite/setup_students.sql

@@ -0,0 +1,14 @@
+CREATE TABLE students (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    name TEXT NOT NULL,
+    course TEXT NOT NULL,
+    year INTEGER NOT NULL
+);
+
+INSERT INTO students (name, course, year)
+VALUES ('Ada Lovelace', 'Cloud Computing', 2);
+INSERT INTO students (name, course, year)
+VALUES ('Alan Turing', 'Artificial Intelligence', 3);
+
+INSERT INTO students (name, course, year)
+VALUES ('Grace Hopper', 'Software Engineering', 2);