29. Safer Alternatives to Pickle

Instead of pickle, use formats that are human-readable, portable, and safe.

Example

import json
from dataclasses import dataclass, asdict

@dataclass
class User:
    name: str
    age: int

user = User("alice", 30)

# 29. Serialize
with open("user.json", "w", encoding="utf-8") as f:
    json.dump(asdict(user), f)

# 29. Deserialize
with open("user.json", "r", encoding="utf-8") as f:
    data = json.load(f)
print(data)

✅ Lesson: Use json or dataclasses for structured, secure serialization.