python中的datetime

datetime

前言

datetime是python中的又一时间日期模块.

使用

datetime中常用的类

• datetime.date 日期类
• datetime.time 时间类
• datetime.datetime 时间日期类
• datetime.timedeita 时间日期delta类

datetime.date

# datetime.date(year, month, day)
>>> d = datetime.date(2018, 10, 7)
>>> print(type(d), d)
<class 'datetime.date'> 2018-10-07

datetime.time

# datetime.time(hour, minute, second, mircosecond)
>>> d = datetime.time(12, 16, 30)
>>> print(type(d), d)
<class 'datetime.time'> 12:16:30

datetime.datetime

# datetime.datetime(year, month, day, hour, minute, second, mircosecond)
>>> d = datetime.datetime(2018, 10, 7, 12, 19, 30)
>>> print(type(d), d)
<class 'datetime.datetime'> 2018-10-07 12:19:30

datetime.timedelta

# datetime.timedelta(days=0, seconds=0, microseconds=0, milliseconds=0, minutes=0, hours=0, weeks=0)
>>> d = datetime.timedelta(hours=5, weeks=2)
>>> print(type(d), d)
<class 'datetime.timedelta'> 14 days, 5:00:00

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datetime.datetime类中常用方法

• now() 返回当前时间日期的datetime对象.
  • date() 日期部分
  • time() 时间部分
  • hour
  • minute
  • second
  • year
  • month
  • day
  • weekday
  • isoweekday
  • iscalendar
• utcnow() 返回当前UTC时间日期的datetime对象.
• strptime() 将时间字符串转换通过规则转换为datetime对象.
• strftime() 与strptime相反.
• fromtimestamp() 将时间戳转换为datetime对象.

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