time模块，datetime模块

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mob604756e75222 2018-04-20 14:59:00

time模块

time模块是包含各方面对时间操作的函数. 尽管这些常常有效但不是所有方法在任意平台中有效。

时间相关的操作，时间有三种表示方式：

import time

# ========== 时间戳 ==========

print time.time()　　

print time.mktime(time.localtime())

# ========== 元组形式 ==========

print time.gmtime() #可加时间戳参数

print time.localtime() #可加时间戳参数

print time.strptime('2014-11-11', '%Y-%m-%d')

# ========== 字符串形式 ==========

print time.strftime('%Y-%m-%d') #默认当前时间

print time.strftime('%Y-%m-%d',time.localtime()) #默认当前时间

print time.asctime()

print time.asctime(time.localtime())

print time.ctime(time.time())

"""

格式化占位符：

%Y Year with century as a decimal number.

%m Month as a decimal number [01,12].

%d Day of the month as a decimal number [01,31].

%H Hour (24-hour clock) as a decimal number [00,23].

%M Minute as a decimal number [00,59].

%S Second as a decimal number [00,61].

%z Time zone offset from UTC.

%a Locale's abbreviated weekday name.

%A Locale's full weekday name.

%b Locale's abbreviated month name.

%B Locale's full month name.

%c Locale's appropriate date and time representation.

%I Hour (12-hour clock) as a decimal number [01,12].

%p Locale's equivalent of either AM or PM.

"""

time模块，datetime模块_占位符

datetime模块提供对于日期和时间进行简单或复杂的操作. datetime 模块提供了一下的可用类型(Available Types)。

datetime.MINYEAR 和 datetime.MAXYEAR 模块常量表示datetime接受的范围
class datetime.date: 一个理想化的日期, 提供year, month, day属性
class datetime.time: 一个理想化的时间, 提供hour, minute, second, microsecond, tzinfo.
class datetime.datetime: 日期和时间的组合.提供year, month, day, hour, minute, second, microsecond, tzinfo.
class datetime.timedelta: 表达两个date,time和datetime持续时间内的微妙差异.
class datetime.tzinfo: 时间对象的抽象基类.