datetime

Posted 2020-10-09 张木清

>>> import datetime
>>> datetime.datetime.now()
datetime.datetime(2017, 9, 30, 9, 6, 45, 542000)
>>> from datetime import datetime
>>> now=datetime.now()
>>> now
datetime.datetime(2017, 9, 30, 9, 6, 59, 310000)
>>> 
KeyboardInterrupt
>>> utcnow=datetime.utcnow()
>>>  utcnow
 
SyntaxError: unexpected indent
>>> 
KeyboardInterrupt
>>> utcnow
datetime.datetime(2017, 9, 30, 1, 7, 21, 933000)
>>> now.month
9
>>> now.year
2017
>>> d=datetime(2014,2,1)
>>> d
datetime.datetime(2014, 2, 1, 0, 0)
>>> d.isoformat()
\'2014-02-01T00:00:00\'
>>> d.isoweekday()
6
>>> 
KeyboardInterrupt
>>> s=datetime.strptime(\'2017/9/30\',\'%Y/%m/%d\')
>>> s
datetime.datetime(2017, 9, 30, 0, 0)
>>> datetime.strptime(\'2017年9月30日星期六\',\'%Y年%m月%d日星期六\')
datetime.datetime(2017, 9, 30, 0, 0)
>>> datetime.strptime(\'2017年9月30日星期六8时42分24秒\',\'%Y年%m月%d日星期六%H时%M分%S秒\')
datetime.datetime(2017, 9, 30, 8, 42, 24)
>>> datetime.strptime(\'9/30/2017\',\'%m/%d/%Y\')
datetime.datetime(2017, 9, 30, 0, 0)
>>> datetime.strptime(\'9/30/2017 8:42:50\',\'%m/%d/%Y %H:%M:%S\')
datetime.datetime(2017, 9, 30, 8, 42, 50)
>>> 

　　

• 将以下datetime类型转换成字符串：
  • 2017年9月28日星期4,10时3分43秒
    Saturday, September 30, 2017
    9/30/2017 9:22:17 AM
    September 30, 2017

 

 

 

from datetime import datetime
f1=datetime(2017,9,28,10,3,43)
print(f1.strftime(\'%Y年%m月%d日%A%H时%M分%S秒\'))

f2=datetime(2017,9,30)
print(f2.strftime(\'%A,%B %d,%Y\'))

f3=datetime(2017,9,30,9,22,17)
print(f3.strftime(\'%m/%d/%Y %I:%M:%S %p\'))

print(f2.strftime(\'%B %d,%Y\'))

 

 

 

 

• 用datetime类型的变量输出以下字符串：
  • 今天是2017年9月30日
    今天是这周的第？天 
    今天是今年的第？天 
    今周是今年的第？周 
    今天是当月的第？天

 

from datetime import datetime
now =datetime.now()
print(now.strftime(\'今天是%Y年%m月%d日\'))
print(now.strftime(\'今天是这周的第%w天\'))
print(now.strftime(\'今天是今年的第%j天\'))
print(now.strftime(\'今周是今年的第%W周\'))
print(now.strftime(\'今天是当月的第%d天\'))