1 #-*-coding=utf-8-*-
2 __author__='zhongtang'
3
4 '''
5 时间戳与字符串的互相转换
6 '''
7
8 import time
9
10 localtime1=time.localtime()
11 time.sleep(5)
12 localtime2=time.localtime(time.time())
13
14 print type(localtime1),localtime1
15 print type(localtime2),localtime2
16
17 gmtime=time.gmtime(time.time())
18 print type(gmtime),gmtime
19
20
21 strtime1='20160518010101'
22 strtime2='20160518020101'
23
24 #字符串变成时间数据结构
25 localtime1=time.strptime(strtime1,'%Y%m%d%H%M%S')
26 localtime2=time.strptime(strtime2,'%Y%m%d%H%M%S')
27
28 print type(localtime1),localtime1
29 print type(localtime2),localtime2
30
31
32 #从时间数据结构转换成时间戳
33 time1= time.mktime(localtime1)
34 time2= time.mktime(localtime2)
35
36 print type(time1),time1
37 print type(time2),time2
38
39 #时间戳可以直接相减，得到以秒为单位的差额
40 print time2-time1
输出结果
1 <type 'time.struct_time'>time.struct_time(tm_year=2016, tm_mon=5, tm_mday=19, tm_hour=9, tm_min=9, tm_sec=30, tm_wday=3, tm_yday=140, tm_isdst=0)
2 <type 'time.struct_time'>time.struct_time(tm_year=2016, tm_mon=5, tm_mday=19, tm_hour=9, tm_min=9, tm_sec=35, tm_wday=3, tm_yday=140, tm_isdst=0)
3 <type 'time.struct_time'>time.struct_time(tm_year=2016, tm_mon=5, tm_mday=19, tm_hour=1, tm_min=9, tm_sec=35, tm_wday=3, tm_yday=140, tm_isdst=0)
4 <type 'time.struct_time'>time.struct_time(tm_year=2016, tm_mon=5, tm_mday=18, tm_hour=1, tm_min=1, tm_sec=1, tm_wday=2, tm_yday=139, tm_isdst=-1)
5 <type 'time.struct_time'>time.struct_time(tm_year=2016, tm_mon=5, tm_mday=18, tm_hour=2, tm_min=1, tm_sec=1, tm_wday=2, tm_yday=139, tm_isdst=-1)
6 <type 'float'>1463504461.0
7 <type 'float'>1463508061.0
8 3600.0
djaogo 时间判断表达
时间
1、gt：大于某个时间
now = datetime.datetime.now()
前一天
start = now – datetime.timedelta(hours=23, minutes=59, seconds=59)
a=yourobject.objects .filter(youdatetimcolumn__gt=start)
2、gte：大于等于某个时间：
a=yourobject.objects .filter(youdatetimcolumn__gte=start)
3、lt：小于
a=yourobject.objects .filter(youdatetimcolumn__lt=start)
4、lte：小于等于
a=yourobject.objects .filter(youdatetimcolumn__lte=start)
5、range：查询时间段
start_date = datetime.date(2005, 1, 1)
end_date = datetime.date(2005, 3, 31)
Entry.objects.filter(pub_date__range=(start_date, end_date))
6、year：查询某年
Entry.objects.filter(pub_date__year=2005)
7、month：查询某月
Entry.objects.filter(pub_date__month=12)
8、day：某天
Entry.objects.filter(pub_date__day=3)
9、week_day：星期几
Entry.objects.filter(pub_date__week_day=2)
10、获取今天的日期，日期格式为yyyy-MM-dd
from django.utils.timezone import now, timedelta
date = now().date() + timedelta(days=-1) #昨天
date = now().date() + timedelta(days=0) #今天
date = now().date() + timedelta(days=1) #明天
python中的最小时间单位是毫秒，没办法精确到微秒用time包的time()函数可以获得当前计算机的挂钟时间，利用它可以获得时间差
import time
time1 = time.time()
#要度量时间的程序
time2 = time.time()
print time2 - time1
