datetime处理日期和时间

from datetime import datetime
now = datetime.now()
print(now)
utcnow = datetime.utcnow()
print(utcnow)

from datetime import datetime
t=datetime(2017, 5, 23, 12, 20)
print(t)

from datetime import datetime

f1=datetime.strptime(‘2017/9/30‘,‘%Y/%m/%d‘)
print(f1)

f2=datetime.strptime(‘2017年9月30日星期六‘,‘%Y年%m月%d日星期六‘)
print(f2)

f3=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‘)
print(f3)

f4=datetime.strptime(‘9/30/2017‘,‘%m/%d/%Y‘)
print(f4)

f5=datetime.strptime(‘9/30/2017 8:42:50 ‘,‘%m/%d/%Y %H:%M:%S ‘)
print(f5)

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‘))

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‘))