डेटा और डिसिमल को JSON में ISO टाइमस्टैम्प स्ट्रिंग्स और डिसिमल स्ट्रिंग्स के रूप में सीरियलाइज़ करें, फिर एक स्पष्ट पाइथन अनुबंध के साथ पुनर्निर्माण करें

import json
from datetime import datetime, timezone
from decimal import Decimal, InvalidOperation

def contract_encoder(obj):
    if isinstance(obj, datetime):
        if obj.tzinfo is None or obj.utcoffset() is None:
            raise TypeError("Timezone-aware datetime required")
        return obj.isoformat()
    if isinstance(obj, Decimal):
        if not obj.is_finite():
            raise TypeError("Finite Decimal required")
        return str(obj)
    raise TypeError("Unsupported custom value")

def reconstruct_data(data):
    if not isinstance(data, dict):
        raise ValueError("Object required")
    if not all(isinstance(data.get(key), str) for key in ("timestamp", "amount")):
        raise ValueError("timestamp and amount must be strings")
    timestamp = datetime.fromisoformat(data["timestamp"])
    if timestamp.tzinfo is None or timestamp.utcoffset() is None:
        raise ValueError("Timezone-aware timestamp required")
    amount = Decimal(data["amount"])
    if not amount.is_finite():
        raise ValueError("Finite amount required")
    return {"timestamp": timestamp, "amount": amount}

data = {"timestamp": datetime(2026, 9, 29, 12, 0, tzinfo=timezone.utc),
        "amount": Decimal("12.30")}
encoded = json.dumps(data, default=contract_encoder, allow_nan=False)
print(encoded)
restored = reconstruct_data(json.loads(encoded))
print(restored["timestamp"].isoformat(), str(restored["amount"]))