1. 将格式化字符串时间转换成时间戳
import time
time_str = "2021-09-10 10:20:11"
time_stamp = int(time.mktime(time.strptime(time_str,'%Y-%m-%d %H:%M:%S'))) # 输出 1631240411
2. 将时间戳转换成格式化的时间格式
import time
time_stamp = int(time.time()) #获取当前时间的时间戳
time_str = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time_stamp)) # 输出 2021-09-10 09:49:15
3. 获取前一天时间
from datetime import datetime, timedelta
# 当前时间
now = datetime.now().strftime("%Y-%m-%d %H:%M:%S") # 2021-09-10 10:01:15
# 前一天时间
yesterday = (datetime.today() - timedelta(days=1)).strftime("%Y-%m-%d %H:%M:%S") # 2021-09-09 10:01:15
