代码如下：
代码语言：javascript复制#encoding=utf-8
print '中国'
import time
#一些函数 time
print time.time()
print time.gmtime()
print time.asctime(time.gmtime())
print time.localtime()
print time.strftime('%Y%m%d %H:%M:%S %z').decode('gbk')
for i in range(2):
time.sleep(0.5)
print i
#类datetime
import datetime
print datetime.date.today()
print datetime.datetime.now().time()
print datetime.datetime.now()
today = datetime.date.today()
next_year = today.replace(year = today.year 1).strftime("%Y.%m.%d")
print next_year
print datetime.date(2000,2,29)-datetime.date(2001,2,28)
#类 decimal
import decimal
print 2.3333333345789
print decimal.Decimal(2.3333333345789)
print decimal.Decimal('2.3333333345789')
#decimal精度设置
decimal.getcontext().prec = 6 #设定本线程的精度
print decimal.Decimal(1) /decimal.Decimal(7)
#计算昨天和明天的日期
today = datetime.date.today()
yestoday = today - datetime.timedelta(days=1)
tomorrow = today datetime.timedelta(days=1)
print 'today',today
print 'yestoday',yestoday
print 'tomorrow',tomorrow打印结果如下：
中国 1395327738.08 time.struct_time(tm_year=2014, tm_mon=3, tm_mday=20, tm_hour=15, tm_min=2, tm_sec=18, tm_wday=3, tm_yday=79, tm_isdst=0) Thu Mar 20 15:02:18 2014 time.struct_time(tm_year=2014, tm_mon=3, tm_mday=20, tm_hour=23, tm_min=2, tm_sec=18, tm_wday=3, tm_yday=79, tm_isdst=0) 20140320 23:02:18 中国标准时间 0 1 2014-03-20 23:02:19.084000 2014-03-20 23:02:19.084000 2015.03.20 -365 days, 0:00:00 2.33333333458 2.333333334578899798117390673724003136157989501953125 2.3333333345789 0.142857 today 2014-03-20 yestoday 2014-03-19 tomorrow 2014-03-21
