函数datetime

datetime

import datetime.datetime

print(datetime.now()) #2019-03-20 11:35:25.(471359)毫秒
# 时间对象

f = datetime.timestamp(datetime.now()) # 将时间对象转换成时间戳
print(datetime.fromtimestamp(f)) # 将时间戳转成时间对象

print(datetime.strptime('2018-11-30','%Y-%m-%d'))
# 将字符串转成时间对象

f = datetime.now()
print(datetime.strftime(f,'%Y-%m-%d'))
# 将时间对象转成字符串

from datetime import datetime,timedelta # 从xx导入 建议
print(datetime.now() - timedelta())
# 这个是datetime的精华