💡 Python QuickBits — 🧩 Pattern Matching in Python 3.10+

Python 3.10 introduced structural pattern matching with match/case. It looks like switch/case, but it’s smarter — you can match not just values, but also dictionary structures (like JSON) and sequences (like CLI args).

📝 Basic Value Matching

Use match/case like a switch statement:

command = "start"

match command:
    case "start":
        print("Starting process...")
    case "stop":
        print("Stopping process...")
    case _:
        print("Unknown command")

📦 Pattern Matching JSON-like Data

You can match against a dict’s shape and extract fields directly:

import json

payload = json.loads('{"type": "user", "name": "Alice"}')

match payload:
    case {"type": "user", "name": name}:
        print(f"User record found: {name}")
    case {"type": "order", "id": order_id}:
        print(f"Order record found: {order_id}")
    case _:
        print("Unknown payload")

💻 Matching CLI Args (Sequence Pattern)

Match lists/tuples directly — useful for CLI-like inputs:

args = ["deploy", "staging"]

match args:
    case ["deploy", env]:
        print(f"Deploying to {env}")
    case ["rollback", env]:
        print(f"Rolling back {env}")
    case _:
        print("Unknown command args")

✅ Key Points

• ✅ Cleaner than nested if/elif.
• ✅ Works on values, dicts, and sequences.
• ✅ Lets you extract variables inline.
• 🐍 Available in Python 3.10 and above.