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python时间差的代码

import timeimport datetime#先获得时间数组格式的日期threeDayAgo = (datetime.datetime.now() - datetime.timedelta(days = 2))print threeDayAgo

data['time']=pd.to_datetime(data['time']) #把第一行改成时间格式data['time_inv']=data['time']-data['time'].shift(1)#计算两行时间差

import timefrom datetime import datetimestart = round(time.time()*1000)print startstart_ = datetime.utcnow()print start_time.sleep(1)end = round(time.time()*1000)print endend_ = datetime.utcnow()print end_c = (end_ - start_)print c.seconds print c.microseconds print cprint c/2以上代码来源于网络,仅供参考,请根据自身需求进行修改.

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

可以适当的嵌入计算时间的代码,如果是以秒为单位,可以使用time模块,类似的代码如下,import timestart = time.time()end = time.time()during = end - start'''other is same here. also you can use datetime module. in which you canformat the time in a friendly format to human. besides that, you can compute the hour, minute from second by own.'''

确保系统时区设置正确.date命令显示的是本地时间.然后 python datetime.now() 默认就是本地时间.123456>>> import datetime>>> datetime. datetime.now()

import datetimenow = datetime.datetime.now()print now.secondnow里面有其所有日期和时间的属性 now.second获得的是int型

1.获取当前时间的两种方法:import datetime,timenow = time.strftime("%Y-%m-%d %H:%M:%S")print nownow = datetime.datetime.now()print now2.获取上个月最后一天的日期(本月的第一天减去1天)last = datetime.date(datetime.date.today(

你把 p=re.compile('^1[358]\d{9}$|^147\d{8}$')修改成 p=re.compile(/^1[358]\d{9}$|^147\d{8}$/)再试试

给一个倒数10个数的例子:import time for i in range(11): print 11-i, time.sleep(1)

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