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- """统一工具函数"""
- import uuid
- import random
- import string
- from datetime import datetime
- from typing import Optional
- def generate_uuid() -> str:
- """生成UUID"""
- return str(uuid.uuid4()).replace("-", "").upper()
- def generate_id(prefix: str = "") -> str:
- """生成带前缀的ID"""
- uid = str(uuid.uuid4()).replace("-", "").upper()
- return f"{prefix}{uid}" if prefix else uid
- def generate_random_password(length: int = 8) -> str:
- """生成随机密码"""
- chars = string.ascii_letters + string.digits
- return ''.join(random.choice(chars) for _ in range(length))
- def get_current_time() -> datetime:
- """获取当前时间"""
- return datetime.now()
- def format_datetime(dt: Optional[datetime]) -> Optional[str]:
- """格式化时间为ISO 8601格式"""
- if dt is None:
- return None
- return dt.strftime("%Y-%m-%d %H:%M:%S")
- def parse_datetime(dt_str: str) -> Optional[datetime]:
- """解析ISO 8601格式时间"""
- if not dt_str:
- return None
- try:
- return datetime.fromisoformat(dt_str.replace("Z", "+00:00"))
- except (ValueError, AttributeError):
- return None
- def get_file_size_display(size_bytes: int) -> str:
- """将字节数转换为可读的文件大小"""
- if size_bytes is None:
- return "0 B"
- for unit in ['B', 'KB', 'MB', 'GB', 'TB']:
- if size_bytes < 1024.0:
- return f"{size_bytes:.2f} {unit}"
- size_bytes /= 1024.0
- return f"{size_bytes:.2f} PB"
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