Python3 日期时间 相关模块(time(时间) / datatime(日期时间) / calendar(日历))
本文由 Luzhuo 编写,转发请保留该信息.
原文: http://blog.csdn.net/Rozol/article/details/71307483
以下代码以Python3.6.1为例
Less is more!
#!/usr/bin/env python
# coding=utf-8
__author__ = 'Luzhuo'
__date__ = '2017/5/5'
# timedemo.py 时间相关的模块演示
# 演示的模块:time(时间) / datatime(处理 日期&时间) / calendar(日历)
import time
def time_demo():
curtime = time.time() # 获取当前时间戳
time_str = time.ctime(curtime) # 转为string格式
print(time_str) # => Fri May 5 18:28:08 2017
time_tup = time.localtime(curtime) # 转为struct_time(tuple)格式
print(time_tup.tm_year) # => 2017
def time_func():
'''
time模块处理时间的相关说明:
1. 部分系统无法处理很久之前或之后的日期和时间 (如:32系统通常时间到2038年为止)
2. UTC (/GMT) 为格林威治标准时间 (简称:世界时间);
3. DST 为夏令时
4. 格式化指示符: %Y(世纪年) / %m(月[01, 12]) / %d(日[01, 31]) / %H(时[00, 23]) / %M(分[00, 59]) / %S(秒[00, 61]) / %w(星期[0, 6])
%b(月E缩写) %B(月E) / %a(星期E缩写) / %A(星期E) / %I(12时[01, 12]) / %c(日期+时间) / %x(日期) / %X(时间) / %p(AM/PM) / %z(时区[-23：59，+23：59]) / %%('%')
%j(年<-日[001, 366]) / %U(年<-星期[00, 53]) / %W(年<-周[00, 53])
5. 星期日为一个星期周期的第一天
'''
# 时间戳
time_s = time.altzone # 夏令时与UTC的差值
time_s = time.timezone # (时区) 本地时间与UTC的差值
time_s = time.time() # 当前时间戳 (受系统时间影响) 单位:秒 ( => 1493986228.8606732 >> 1493986228s)
time_s = time.mktime(time_tup) # 元组转成时间
time_s = time.monotonic() # 单调始终的值 (不受系统时钟更新的影响) 单位:秒 ( => 250075.796 >> 250075s)
time_s = time.perf_counter() # (高分辨率)性能计数器 (包括睡眠时间) 单位:秒 ( => 552.1569544781966 >> 552s)
# 元组(struct_time) [格式:(2008, 1, 1, 0, 0, 0, -1, -1, -1) >> (年, 月, 日, 时, 分, 秒, 星期, 年<-日, DST)]
# gmtime([secs]) // 时间戳转为UTC; 0: 开始0年的时间(1970年) / 无参:UTC / time_s:转为世界时间
time_tup = time.gmtime(time_s)
# localtime([secs]) // 时间戳转为本地时间
time_tup = time.localtime(time_s)
# strptime(string[, format]) 解析时间
time_tup = time.strptime('Tue Jan 01 00:00:00 2008', '%a %b %d %H:%M:%S %Y') # 字符串解析成时间
# struct_time
time_year = time_tup.tm_year # 从struct_time中获取数据, 其他省略
# 字符串
# asctime([t]) // 时间格式化 (系统样式); 不传参为当前时间
time_str = time.asctime(time_tup)
# ctime([secs]) // 同asctime()
time_str = time.ctime(time_s)
# strftime(format[, t])
time_str = time.strftime("%Y-%m-%d-%H-%M-%S", time_tup)
# 其他
time.sleep(1.1) # 线程睡眠 单位:s
time_dst = time.daylight # 夏令时时区(0未定义)
# ===========================================
import datetime
def datetime_demo():
datetime_dt = datetime.datetime.today() # 获取当前日期和时间
datetime_str = datetime_dt.strftime("%Y/%m/%d %H:%M:%S") # 格式化日期时间
print(datetime_str)
time_delta = datetime.timedelta(hours=-3) # 时间间隔
datetime_pre = datetime_dt + time_delta # 将时间提前12小时
print(datetime_pre.ctime())
# 将日期时间转为日期
date = datetime_dt.date()
print("现在是 {}年 {}月 {}日".format(date.year, date.month, date.day))
# 将日期时间转为时间
time = datetime_dt.time()
print("现在是 {}".format(time.isoformat()))
# 将日期时间转为时间戳
time_s = datetime_dt.timestamp()
print("现在的时间戳: {}".format(time_s))
def datetime_func():
'''
用于处理日期和时间
'''
timedelta_temp = datetime.timedelta(seconds=60, minutes=59, hours=23)
date_temp = datetime.date.today() - datetime.timedelta(1)
# === timedelta ===
# 内部只存储: days日[-999999999, 999999999) / seconds秒 [0, 86399) / microseconds微秒(1E-6秒)[0, 999999)
# milliseconds毫秒(1‰秒)[ == 1000 * microseconds ] / minutes分[ == 60 * seconds] / hours时[ == 3600 * seconds] / weeks周期[ == 7 * days]
# timedelta(days=0, seconds=0, microseconds=0, milliseconds=0, minutes=0, hours=0, weeks=0) // 表示时间的间隔
timedelta = datetime.timedelta(1)
time_total = timedelta.total_seconds() # 计算时间差的总秒数 ( => 86400.0 )
# 计算
boolean = timedelta == timedelta_temp # 时间是否相等 => True
timedelta = timedelta + timedelta_temp # 加上 => timedelta(2)
timedelta = timedelta - timedelta_temp # 减去 => timedelta(0)
timedelta = timedelta * 10 # 乘以 => timedelta(10)
timedelta = timedelta * 0.01 # 乘以浮点数 => timedelta(0, 864)
fnum = timedelta / timedelta_temp # 除以 => 1.0
timedelta = timedelta / 10 # 除以整数 或 浮点数 (不能除以0) => timedelta(0, 8640)
num = timedelta // timedelta_temp # 商(delta / 整数)(不能除以0) => 1
timedelta = timedelta % timedelta_temp # 余数 => timedelta(0)
num, time_delta = divmod(timedelta, timedelta_temp) # (商, 余数) => (1, datetime.timedelta(0))
timedelta = +timedelta # 内存地址引用(没用)
timedelta = -timedelta # 取反 => timedelta(-1)
timedelta = abs(time_delta) # 绝对值
strs = str(time_delta) # 格式化为[D day[s], ][H]H:MM:SS[.UUUUUU]字符串 => '1 day, 0:00:00'
strs = repr(time_delta) # 格式化为datetime.timedelta(D[, S[, U]])字符串 => 'datetime.timedelta(1)'
# === date ===
# date 可做字典的键, 所有date对象被为True
# year年[MINYEAR, MAXYEAR] / month月[1, 12] / day日[1, 给定年月的最大天数]
# date(year, month, day) # 公历日历中的日期, 两个方向上无限延伸
date = datetime.date(2017, 5, 6)
date = date.min # 最早日期 => date(1, 1, 1)
date = date.max # 最晚日期 => date(9999, 12, 31)
timedelta = date.resolution # 不相等日期之间最小差异 (1天) => timedelta(1)
date_year = date.year # year年 [MINYEAR, MAXYEAR]
date_month = date.month # month月 [1, 12]
date_day = date.day # day日 [1, 给定年月的最大天数]
date = datetime.date.today() # 当前本地日期 (类方法) => date(2017, 5, 6)
date = datetime.date.fromtimestamp(time.time()) # 将时间戳转为日历 (类方法) => date(2017, 5, 6)
date = datetime.date.fromordinal(12) # 返回公历序数日期 (类方法) => date(1, 1, 12)
# 计算
date = date + timedelta # 加 => date(2017, 5, 7)
date = date - timedelta
timedelta = date - timedelta # 日历相减 => timedelta(1)
# replace(year=None, month=None, day=None)
date = date.replace(day=12) # 替换 => date(2017, 5, 12)
num = date.toordinal() # date在公历日历中的序数 (从date.min开始数)
num = date.weekday() # 周几 (0:周日)
num = date.isoweekday() # 周几 (1:周一)
year, week, weekday = date.isocalendar() # 返回年, 周数, 周几 (year, week, weekday) (注:weekday == isoweekday)
date_str = date.isoformat() # 格式化为‘YYYY-MM-DD’格式 => '2017-05-06'
date_str = date.ctime() # 格式化为日期格式 => 'Sat May 6 00:00:00 2017' (注:时分秒均为0, 下同)
date_str = date.strftime("%Y-%m-%d-%H-%M-%S") # 格式化为指定格式
# === datetime ===
# datetime 可做字典的键。所有datetime都为True
# year年[MINYEAR, MAXYEAR] / month月[1, 12] / day日[1, 给定年月的最大天数] / hour时[0, 24) / minute[0. 60) / second秒[0, 60) / microsecond微秒[0, 1000000)
# datetime.datetime(year, month, day, hour=0, minute=0, second=0, microsecond=0, tzinfo=None)
# 类方法
date_time = datetime.datetime.today() # 当前本地日期时间 => datetime(2017, 5, 6, 17, 51, 59, 124232)
date_time = datetime.datetime.now() # 同today
date_time = datetime.datetime.utcnow() # UTC日期和时间
date_time = datetime.datetime.fromtimestamp(time.time()) # 时间戳转为datetime
date_time = datetime.datetime.utcfromtimestamp(time.time()) # 时间戳转为UTCdatetime
date_time = datetime.datetime.fromordinal(12) # 公历序数日期
date_time = datetime.datetime.strptime('Tue Jan 01 00:00:00 2008', '%a %b %d %H:%M:%S %Y') # 解析
# 实例方法
date = date_time.date() # 转为date => date(2017, 5, 6)
time = date_time.time() # 转为time => time(19, 10, 46, 149016)
time_s = date_time.timestamp() # 转为时间戳
struct_time = date_time.timetuple() # 转为 struct_time
struct_time = date_time.utctimetuple()
# replace([year[, month[, day[, hour[, minute[, second[, microsecond[, tzinfo]]]]]]]]) // 替换
date_time = date_time.replace(year=2017) # => datetime(2018, 5, 6, 19, 10, 46, 149016)
num = date_time.toordinal() # 公历序数
num = date_time.weekday() # 周几 (0:周日)
num = date_time.isoweekday() # 周几 (1:周一)
year, week, weekday = date_time.isocalendar() # (year, week, weekday(1:星期一))
datetime_str = date_time.isoformat(sep='T') # 格式化, sep时间和日期分隔符 => '2017-05-06T19:10:46.149016'
datetime_str = date_time.ctime() # 格式化
datetime_str = date_time.strftime("%Y-%m-%d-%H-%M-%S") # 格式化
# === time ===
# time可做字典的键, time视为True
# Time表示一天中的本地时间,独立于任何特定的日子
# hour时[0, 24) minute分[0, 60) second秒[0, 60) microsecond微秒[0, 1000000)
# datetime.time(hour=0, minute=0, second=0, microsecond=0, tzinfo=None)
time = datetime.time(18, 30, 59)
time_t = time.min # 最早 => time(0, 0)
time_t = time.max # 最晚 => time(23, 59, 59, 999999)
time_t = time.resolution # 最小差值 => timedelta(0, 0, 1)
num = time.hour
num = time.minute
mum = time.second
mum = time.microsecond
# replace([hour[, minute[, second[, microsecond[, tzinfo]]]]])
time_t = time.replace(hour=17) # 替换
time_s = time.isoformat() # 格式化 => '18:30:59'
time_s = time.strftime("%H-%M-%S") # 格式化
# ===========================================
import calendar
def calendar_demo():
calen_text = calendar.TextCalendar()
# 打印月历
calen_text.prmonth(2017, 5, w=0, l=0)
# 打印年历
calen_text.pryear(2017, w=2, l=1, c=6, m=3)
def calendar_func():
'''
日历相关的操作
默认星期一作为一周的第一天, 可设置
'''
# === Calendar ===
# Calendar(firstweekday=0) // Calendar对象 firstweekday:一周的第一天,0周一(默认),6周日
calen = calendar.Calendar()
calen_iter = calen.iterweekdays() # 迭代器,一周的星期数字 => 0 1 2 3 4 5 6
calen_iter = calen.itermonthdates(2017, 5) # 迭代器, x年x月中所有天 => 2017-05-01 2017-05-02 017-05-03 ...
calen_iter = calen.itermonthdays2(2017, 5) # 迭代器, x年x月中所有(日,星期) => (1, 0) (2, 1) (3, 2) ...
calen_iter = calen.itermonthdays(2017, 5) # 迭代器, x年x月中的所有天 => 1 2 3 ...
calen_iter = calen.monthdatescalendar(2017, 5) # 迭代器, x年x月中data(年,月,日)对象 => date(2017, 5, 1) date(2017, 5, 2) ...
calen_iter = calen.monthdays2calendar(2017, 5) # 迭代器, x年x月中(日,星期)的周列表 => [(1, 0), (2, 1) ...] [ ... ] ...
calen_iter = calen.monthdayscalendar(2017, 5) # 迭代器, x年x月中日的周列表 => [1,2,3 ...] [...] ...
calen_lists = calen.yeardatescalendar(2017, width=3) # x年所有data(年,月,日)对象的月列表
calen_lists = calen.yeardays2calendar(2017, width=3) # x年所有(日,星期)的月列表
calen_lists = calen.yeardayscalendar(2017, width=3) # x年所有日的月列表
# === TextCalendar ===
# TextCalendar(firstweekday=0) // 纯文本的日历
calen_text = calendar.TextCalendar()
calen_str = calen_text.formatmonth(2017, 5, w=0, l=0) # x年x月所有日
calen_text.prmonth(2017, 5, w=0, l=0) # (打印) x年x月所有日
calen_str = calen_text.formatyear(