Cracking Intermediate Python Episode 1: Context Manager

context_manager_use_cases.py

from threading import Lock
import sqlite3
import requests

# thread lock example
lock = Lock()

with lock:
    # Critical section of code
    print("Critical section running")

# database connection example
with sqlite3.connect("database.db") as conn:
    cursor = conn.cursor()
    cursor.execute("SELECT * FROM table")

# requests session example
with requests.Session() as session:
    response = session.get('http://example.com')
    print(response.status_code)