本篇文章介绍airbus中运行时长装饰器，用于显示函数从开始运行到结束的时间，并在终端中打印出运行时长。

1. 源码

import logging
from datetime import datetime
from functools import wraps
def timeit(func):
    """Print cost time of `func` run."""
    log = logging.getLogger("Timeit")
    @wraps(func)
    def wrapper(*args, **kwargs):
        start = datetime.now()
        res = func(*args, **kwargs)
        end = datetime.now()
        cost_time = round((end - start).total_seconds(), 3)
        text = (f"[bold red]{func.__name__}[/] function:\n" 
                f"  Start time: {start.strftime('%Y-%m-%d %H:%M:%S')}\n"
                f"  Cost  time: {cost_time} seconds")
        log.info(text, extra={"markup": True})
        return res
    return wrapper

2. 使用方法

import time
from airbus.decorators import timeit
@timeit
def test_timeit():
    for i in range(5):
        time.sleep(1)
test_timeit()