Python常用的日期时间处理方法示例
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2023-08-17 09:30:30
#-*- coding: utf-8 -*-
import datetime
#给定日期向后n天的日期
def dateadd_day(days):...
#-*- coding: utf-8 -*- import datetime #给定日期向后n天的日期 def dateadd_day(days): d1 = datetime.datetime.now() d3 = d1 + datetime.timedelta(days) return d3 #昨天 def getyesterday(): today = datetime.date.today() oneday = datetime.timedelta(days=1) yesterday = today - oneday return yesterday #今天 def gettoday(): return datetime.date.today() #获取给定参数的前几天的日期,返回一个list def getdaysbefore(num): today = datetime.date.today() oneday = datetime.timedelta(days=1) li = [] for i in range(0, num): #今天减一天,一天一天减 today = today - oneday #把日期转换成字符串 li.append(datetostr(today)) return li #将字符串转换成datetime类型 def strtodatetime(datestr, format): return datetime.datetime.strptime(datestr, format) #时间转换成字符串,格式为2015-02-02 def datetostr(date): return str(date)[0:10] #时间转换成字符串,格式为2015-02-02 def datetostr_secod(date): return str(date)[0:19] #两个日期相隔多少天,例:2015-2-04和2015-3-1 def datediff(begindate, enddate): format = "%y-%m-%d" bd = strtodatetime(begindate, format) ed = strtodatetime(enddate, format) oneday = datetime.timedelta(days=1) count = 0 while bd != ed: ed = ed - oneday count += 1 return count #两个日期之间相差的秒 def datediff_seconds(begindate, enddate): format = "%y-%m-%d %h:%m:%s" if " " not in begindate or ':' not in begindate: bformat = "%y-%m-%d" else: bformat = format if " " not in enddate or ':' not in enddate: eformat = "%y-%m-%d" else: eformat = format starttime = strtodatetime(begindate, bformat) endtime = strtodatetime(enddate, eformat) ret = endtime - starttime return ret.days * 86400 + ret.seconds #获取两个时间段的所有时间,返回list def getdays(begindate, enddate): format = "%y-%m-%d" begin = strtodatetime(begindate, format) oneday = datetime.timedelta(days=1) num = datediff(begindate, enddate) + 1 li = [] for i in range(0, num): li.append(datetostr(begin)) begin = begin + oneday return li #获取当前年份 是一个字符串 def getyear(date=datetime.date.today()): return str(date)[0:4] #获取当前月份 是一个字符串 def getmonth(date=datetime.date.today()): return str(date)[5:7] #获取当前天 是一个字符串 def getday(date=datetime.date.today()): return str(date)[8:10] #获取当前小时 是一个字符串 def gethour(date=datetime.datetime.now()): return str(date)[11:13] #获取当前分钟 是一个字符串 def getminute(date=datetime.datetime.now()): return str(date)[14:16] #获取当前秒 是一个字符串 def getsecond(date=datetime.datetime.now()): return str(date)[17:19] def getnow(): return datetime.datetime.now() print dateadd_day(10) #2015-02-14 16:41:13.275000 print getyesterday() #2015-02-03 print gettoday() #2015-02-04 print getdaysbefore(3) #['2015-02-03', '2015-02-02', '2015-02-01'] print datediff('2015-2-01', '2015-10-05') #246 print datediff_seconds('2015-02-04', '2015-02-05') #86400 print datediff_seconds('2015-02-04 22:00:00', '2015-02-05') #7200 print getdays('2015-2-03', '2015-2-05') #['2015-02-03', '2015-02-04', '2015-02-05'] print datetostr_secod(getnow()) #2015-02-04 16:46:47 print str(getyear(dateadd_day(-50))) + '-'\ + getmonth() + '-'\ + getday() + ' '\ + gethour() + ':'\ + getminute() + ':'\ + getsecond() #2014-02-04 16:59:04 print getnow() #2015-02-04 16:46:47.454000
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