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这篇文章将为大家详细讲解有关python中datetime的使用方法,文章内容质量较高,因此小编分享给大家做个参考,希望大家阅读完这篇文章后对相关知识有一定的了解。
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# 时间的替换 import time,datetime today = datetime.datetime.today() print('当前时间:',today) print('当前时间转换成整h整m整s:',today.replace(minute=0, second=0)) # 时间的加减 res1 = today + datetime.timedelta(days=1,minutes=60) print('增加的时间为res:',res1) res0 = datetime.datetime.now() print('未格式化时间res0:',res0) # 将时间转字符串格式化 res2 = datetime.datetime.now().strftime("%Y/%m/%d") print('格式化后的时间res:',res2) # 字符串转时间 res3 = datetime.datetime.strptime('2018/10/11', "%Y/%m/%d") print('字符串转特定的时间res:',res3) # 转成时间元组 print('转成时间元组:',today.timetuple()) #日期0000时间格式转换为普通时间格式 str_time ='2018-12-14 00:00:00' start_date = datetime.datetime.strptime(str_time, "%Y-%m-%d %H:%M:%S") print('start_date:',start_date) print('---------第二部分----------') from datetime import datetime from datetime import timedelta # 1) 获取当前日期和时间 today = datetime.today() # 返回当前时间时分秒都为0 print('当前today:',today) today1 = datetime.now() # 返回当前日期和时间 # now.hour # 时 # now.minute # 分 # now.isoweekday()# 返回的1-7代表周一--周日; # now.weekday()# 返回的0-6代表周一--到周日 # 而标准格式种%w 1-6表示周一--周六,0代表周日 print('today1', today1 ) today2 = datetime.utcnow() # 返回当前东八区时间就是比当时时间少8个小时 print('today2:',today2) # 2) 获取指定日期和时间,加减计算 time= datetime(2019, 5, 12, 12, 13, 14) d= time + timedelta(weeks=0, days=0, hours=0, minutes=0, seconds=0, milliseconds=0, microseconds=0, ) #依次为 "周" "天", "时","分","秒","毫秒","微秒" print('time:',time) print('d:',d) time1= "2019-5-12 12:13:14" # 字符串 日期 d1 = datetime.strptime(str(time1),'%Y-%m-%d %H:%M:%S') plus= d1 + timedelta(days=1) # 加 minus = d1 - timedelta(days=1) # 减 print('d1:',d1) print('plus:',plus) print('minus:',minus) time2= 20190512121314 d2 = datetime.strptime(str(time2),'%Y%m%d%H%M%S') delta = d2 + timedelta(days=1) print('time2:',time2) print('d2:',d2 ) print('delta:',delta) # 3) 日期datetime-timestamp 时间戳相互转 now_stamp = time.timestamp() print('指定时间对应时间戳 :', now_stamp) print('对应本地时间 :', datetime.fromtimestamp(now_stamp )) print('UTC标准时间 :', datetime.utcfromtimestamp(now_stamp )) print('本周的第几天:', datetime.fromtimestamp(now_stamp ).weekday()) # 4) datetime 时间 转换为str字符串 now = datetime.now() print('当前时间的的:', now) print('转换为str字符串:',now.strftime('%Y%m%d%H%M%S')) print('--------第三部分-------------') import datetime from datetime import timedelta now = datetime.datetime.now() print('now:',now) # 今天 today = now print('today:',today) # 昨天 yesterday = now - timedelta(days=1) print('yesterday:',yesterday) # 明天 tomorrow = now + timedelta(days=1) print('tomorrow:',tomorrow) # 当前季度 now_quarter = now.month / 3 if now.month % 3 == 0 else now.month / 3 + 1 print('now_quarter:',now_quarter) # 本周第一天和最后一天 this_week_start = now - timedelta(days=now.weekday()) this_week_end = now + timedelta(days=6 - now.weekday()) print('this_week_start:',this_week_start) print('this_week_end:',this_week_end) # 上周第一天和最后一天 last_week_start = now - timedelta(days=now.weekday() + 7) last_week_end = now - timedelta(days=now.weekday() + 1) print('last_week_start:',last_week_start) print('last_week_end:',last_week_end) # 本月第一天和最后一天 this_month_start = datetime.datetime(now.year, now.month, 1) month = now.month + 1 if month == 13: month = 1 year = now.year + 1 this_month_end = datetime.datetime(now.year + 1, 1, 1) - timedelta(days=1) print('this_month_end:',this_month_end ) else: this_month_end = datetime.datetime(now.year, now.month + 1, 1) - timedelta(days=1) print('this_month_end:',this_month_end ) # 上月第一天和最后一天 last_month_end = this_month_start - timedelta(days=1) last_month_start = datetime.datetime(last_month_end.year, last_month_end.month, 1) print('last_month_end:',last_month_end) print('last_month_start:',last_month_start) # 本季第一天和最后一天 month = (now.month - 1) - (now.month - 1) % 3 + 1 this_quarter_start = datetime.datetime(now.year, month, 1) this_quarter_end = datetime.datetime(now.year, month + 3, 1) - timedelta(days=1) print('this_quarter_start:',this_quarter_start) print('this_quarter_end:',this_quarter_end) # 上季第一天和最后一天 last_quarter_end = this_quarter_start - timedelta(days=1) last_quarter_start = datetime.datetime(last_quarter_end.year, last_quarter_end.month - 2, 1) print('last_quarter_end:',last_quarter_end) print('last_quarter_start:',last_quarter_start) # 本年第一天和最后一天 this_year_start = datetime.datetime(now.year, 1, 1) this_year_end = datetime.datetime(now.year + 1, 1, 1) - timedelta(days=1) print('this_year_start:',this_year_start) print('this_year_end:',this_year_end) # 去年第一天和最后一天 last_year_end = this_year_start - timedelta(days=1) last_year_start = datetime.datetime(last_year_end.year, 1, 1) print('last_year_end:',last_year_end) print('last_year_start:',last_year_start)
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