【python随记】datetime相关

﹏ヽ暗。殇╰゛Y 2022-11-13 06:25 139阅读 0赞

#### 1.时间戳转换 ####

# 时间戳相关
    time_stamp_now = int(time.time())  # 获取当前时间戳
    print(time_stamp_now)  # 1616726503
    
    struct_time = time.localtime(time_stamp_now)  # 将时间戳转成时间数组（struct_time类型）
    
    struct_time_str = time.strftime("%Y-%m-%d %H:%M:%S", struct_time)  # 格式化为字符串
    print(struct_time_str)  # 2021-03-26 10:41:43
    
    stamp = time.mktime(struct_time)  # 将时间数组（struct_time类型）转成时间戳
    print(int(stamp))  # 1616726786

#### 2.计算时间间隔 ####

即距离某个时间点相差多长时间，或者获取某个时间距离时间间隔之后的时间

import datetime
    from datetime import timedelta
    
    # 获取60天前（后）的时间
    now_dt = datetime.datetime.now()  # 2021-03-26 09:57:37.465323
    before_dt = now_dt - timedelta(days=60)  # 2021-01-25 09:57:37.465323
    # before_dt = now_dt - timedelta(minutes=60)
    # before_dt = now_dt - timedelta(seconds=60)
    # before_dt = now_dt - timedelta(milliseconds=60) # 毫秒
    # before_dt = now_dt - timedelta(microseconds=60) # 微秒
    print(before_dt)
    
    # 计算时间间隔（过了多少天）
    create_time_dt = datetime.datetime.strptime("2021-01-25 09:57:37", '%Y-%m-%d %H:%M:%S')
    time_delta = (now_dt - create_time_dt).days  # 60
    # time_delta = (now_dt - create_time_dt).seconds # 885
    # time_delta = (now_dt - create_time_dt).microseconds # 480401
    print(time_delta)

#### 3.常用方法 ####

from datetime import datetime
    
    def get_datetime_now_str():
        return datetime.strftime(datetime.now(), "%Y-%m-%d %H:%M:%S")
    
    def get_datetime_from_str(time_str):
        return datetime.strptime(time_str, "%Y-%m-%d %H:%M:%S")
    
    if __name__ == '__main__':
        now_str = get_datetime_now_str()
        print(now_str, "type:", type(now_str))
    
        now_dt = get_datetime_from_str(now_str)
        print(now_dt, "type: ", type(now_dt))