# python
from dataclasses import dataclass, field
import uuid
import time

@dataclass(kw_only=True)
class BaseModel:
    id: str = field(default_factory=lambda: str(uuid.uuid4()))
    created_at: float = field(default_factory=time.time)
    updated_at: float = field(default_factory=time.time)

    def touch(self):
        self.updated_at = time.time()

    def to_dict(self):
        return {
            'id': self.id,
            'created_at': self.created_at,
            'updated_at': self.updated_at
        }