import datetime
import time
import calendar

# 获取此时的时间
print time.localtime()

//输出格式为：
time.struct_time(tm_year=2015, tm_mon=12, tm_mday=29, tm_hour=1, tm_min=10, tm_sec=25, tm_wday=1, tm_yday=363, tm_isdst=0)

 # 获取当天的日期
 print datetime.datetime.now()
 print datetime.date.today()

# 获取昨天的日期
def getYesterday():
 today = datetime.date.today()
 oneday = datetime.timedelta(days=1)
 yesterday = today - oneday
 print type(today)  # 查看获取到时间的类型
 print type(yesterday)
 return yesterday
yesterday = getYesterday()
print "昨天的时间：", yesterday

# 字符串转换为时间
def strTodatetime(datestr, format):
 return datetime.datetime.strptime(datestr, format)
print time.strftime("%Y-%m-%d", time.localtime())
print strTodatetime("2014-3-1","%Y-%m-%d")
print time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
print strTodatetime("2005-2-16","%Y-%m-%d")-strTodatetime("2004-12-31","%Y-%m-%d")

# 获取某个月的日历，返回字符串类型
cal = calendar.month(2015, 12)
print cal
calendar.setfirstweekday(calendar.SUNDAY) # 设置日历的第一天
cal = calendar.month(2015, 12)
print cal

# 获取一年的日历
cal = calendar.calendar(2015)
print cal
cal = calendar.HTMLCalendar(calendar.MONDAY)
print cal.formatmonth(2015, 12)

# 判断是否闰年、两个年份之间闰年的个数
print calendar.isleap(2012)
print calendar.leapdays(2010, 2015)

import time 
import datetime 
 
 
#两日期相减 
 
d1 = datetime.datetime(2005, 2, 16) 
d2 = datetime.datetime(2004, 12, 31) 
print (d1 - d2).days


  
#运行时间： 
  

starttime = datetime.datetime.now() 
endtime = datetime.datetime.now() 
print (endtime - starttime).seconds
 
#计算当前时间向后10天的时间。 
# 如果是小时 days 换成 hours 
 
 
d1 = datetime.datetime.now() 
d3 = d1 datetime.timedelta(days =10) 
 
print str(d3) 
print d3.ctime()

time.ctime([sec])#把秒数转换成日期格式，如果不带参数，则显示当前的时间。
 
>>> import time
>>> time.ctime()
>>> "Wed Jun 14 15:02:50 2006"
>>> time.ctime(1138068452427683)
"Sat Dec 14 04:51:44 1901" 
>>> import time
>>> time.strftime("%Y-%m-%d %X",time.localtime())
"2011-03-15 20:42:12"
>>> time.strftime("%Y-%m-%d %H:%M:%S",time.localtime())
"2011-03-15 20:03:47"
DateTime模块
－－－－－－－－－－－－－－－－－－－－－－－－－－－－
datetime 将日期转化为秒
>>> import datetime,time
>>> time.mktime(datetime.datetime(2009,1,1).timetuple())
1230739200.0
>>> cc=[2000,11,3,12,43,33] #Attributes: year, month, day, hour, minute, second
>>> time.mktime(datetime.datetime(cc[0],cc[1],cc[2],cc[3],cc[4],cc[5]).timetuple())
973226613.0
time.time()取得当前时间；
time.localtime()取得本地时间；
time.strftime()格式化日期；
time.strptime(timeString)把字符串转化为日期；

判断输入的日期是星期几
>>> datetime.datetime(2011,02,15).weekday()
1
>>> datetime.datetime(2011,02,15).weekday()
1
>>> datetime.datetime(2011,02,16).weekday()
2
>>> datetime.datetime(2011,02,17).weekday()
3
>>>
datetime模块获取当前时间
>>> datetime.datetime.utcnow()
datetime.datetime(2011, 3, 15, 13, 19, 32, 264194)
>>> datetime.datetime.utcnow().strftime("%Y-%m-%d %H:%M:%S") 格式化
'2011-03-15 13:19:27'
>>>