import datetime

time =datetime.datetime.now()

print(time,type(time))

strtime =str(time)

print(strtime[:strtime.find('.')],type(strtime))# 缺点格式固定了无法修改

# datatime模块

import datetime

now_time = datetime.datetime.now()  # 现在的时间

# 只能调整的字段：weeks days hours minutes seconds

print(datetime.datetime.now() + datetime.timedelta(weeks=3)) # 三周后

print(datetime.datetime.now() + datetime.timedelta(weeks=-3)) # 三周前

print(datetime.datetime.now() + datetime.timedelta(days=-3)) # 三天前

print(datetime.datetime.now() + datetime.timedelta(days=3)) # 三天后

print(datetime.datetime.now() + datetime.timedelta(hours=5)) # 5小时后

print(datetime.datetime.now() + datetime.timedelta(hours=-5)) # 5小时前

print(datetime.datetime.now() + datetime.timedelta(minutes=-15)) # 15分钟前

print(datetime.datetime.now() + datetime.timedelta(minutes=15)) # 15分钟后

print(datetime.datetime.now() + datetime.timedelta(seconds=-70)) # 70秒前

print(datetime.datetime.now() + datetime.timedelta(seconds=70)) # 70秒后

current_time = datetime.datetime.now()

# 可直接调整到指定的 年 月 日 时 分 秒 等

print(current_time.replace(year=1977))  # 直接调整到1977年

print(current_time.replace(month=1))  # 直接调整到1月份

print(current_time.replace(year=1989,month=4,day=25))  # 1989-04-25 18:49:05.898601

# 将时间戳转化成时间

print(datetime.date.fromtimestamp(1232132131))  # 2009-01-17