Python日期
1. datatime
from datetime import datetime, date now = datetime.now() print(now) # 2020-01-20 01:24:01.843183 to = date.today() print(to) # 2020-01-20 print(datetime(2000, 1, 1, 1, 0, 0)) # 2000-01-01 01:00:00 delta = now - datetime(2000, 1, 1, 1, 0, 0) print(now, type(now)) # 2020-01-20 01:24:01.843183 <class 'datetime.datetime'> print(now.date()) # 2020-01-20 print(now.time()) # 2020-01-20 print(delta) # 7324 days, 0:24:01.843183 print(delta.days) # 7324
1.1 strptime
from datetime import datetime S=datetime.strptime('2019/07/07','%Y/%m/%d') print(S,type(S)) S=datetime.strptime('2019年7月7日星期日','%Y年%m月%d日星期日') print(S,type(S)) S=datetime.strptime('2019年7月7日星期日8时42分24秒','%Y年%m月%d日星期日%H时%M分%S秒') print(S,type(S)) S=datetime.strptime('7/7/2019','%m/%d/%Y') print(S,type(S)) S=datetime.strptime('7/7/2019 8:42:50','%m/%d/%Y %H:%M:%S') print(S,type(S)) #结果: 2019-07-07 00:00:00 <class 'datetime.datetime'> 2019-07-07 00:00:00 <class 'datetime.datetime'> 2019-07-07 08:42:24 <class 'datetime.datetime'> 2019-07-07 00:00:00 <class 'datetime.datetime'> 2019-07-07 08:42:50 <class 'datetime.datetime'>
1.2 strftime
dt=datetime.now() s=dt.strftime('%m/%d/%Y %H:%M:%S %p') print(s,type(s)) s=dt.strftime('%A,%B %d,%Y') print(s,type(s)) txt =('%s年%s月%s日星期%s %s时%s分%s秒'%(dt.strftime('%Y'),dt.strftime('%m'),dt.strftime('%d'),\<br>dt.strftime('%w'),dt.strftime('%H'),dt.strftime('%M'),dt.strftime('%S'))) print(txt) s=dt.strftime('%B %d,%Y') print(s,type(s)) 结果: 07/07/2019 14:57:17 PM <class 'str'> Sunday,July 07,2019 <class 'str'> 2019年07月07日星期0 14时57分17秒 July 07,2019 <class 'str'>
2. time
import time # (1)当前时间戳 # time.time() one = time.time() print(one) # 1579454251.8242934 # (2)时间戳 → 元组时间 two = time.localtime(time.time()) print(two) # time.struct_time(tm_year=2020, tm_mon=1, tm_mday=20, tm_hour=1, tm_min=17, tm_sec=31, tm_wday=0, tm_yday=20, tm_isdst=0) # (3)时间戳 → 可视化时间 three = time.ctime(time.time()) print(three) # Mon Jan 20 01:17:31 2020 # (4)元组时间 → 时间戳 four = time.mktime(two) print(four) # 1579454251.0 # (5)元组时间 → 可视化时间 five = time.asctime() print(five) # Mon Jan 20 01:17:31 2020 # (6)时间元组 → 可视化时间(定制) six = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()) print(six) # 2020-01-20 01:17:31 # (7)可视化时间(定制) → 时间元祖 print("时间元祖:", time.strptime('2019-7-7 11:32:23', '%Y-%m-%d %H:%M:%S')) # 时间元祖: time.struct_time(tm_year=2019, tm_mon=7, tm_mday=7, tm_hour=11, tm_min=32, tm_sec=23, tm_wday=6, tm_yday=188, tm_isdst=-1) # (8)将格式字符串转换为时间戳 eight = "Sun Jul 7 10:48:24 2019" print(time.mktime(time.strptime(eight, "%a %b %d %H:%M:%S %Y"))) # 1562467704.0