datetime模块

datetime时间模块

对于天的操作：

import datetime
today = str(datetime.date.today())
tmp = today.split("-")
today = datetime.date(int(tmp[0]), int(tmp[1]), int(tmp[2]))
print today
print type(today)
oneday = datetime.timedelta(days=1)
print oneday
yestaday = today - oneday
print yestaday
##############
2017-11-07
<type 'datetime.date'>
1 day, 0:00:00
2017-11-06

对于星期的操作：

import datetime
date_time = '2015-06-03'
date_array = date_time.split('-')
date = datetime.date(int(date_array[0]), int(date_array[1]), int(date_array[2]))
week_day = date.timetuple().tm_wday   # 查看今天距离星期一几天
print week_day
# 计算星期一
begin_day_of_week = date - datetime.timedelta(week_day)
print begin_day_of_week
# 计算星期日
end_day_of_week = date + datetime.timedelta(6 - week_day)
print end_day_of_week
#########
2
2015-06-01
2015-06-07

对于的月的操作：

import datetime
import calendar

date_time = '2015-06-03'
date_array = date_time.split('-')
date = datetime.date(int(date_array[0]), int(date_array[1]), int(date_array[2]))

month = date.month      # 月份
month_day = date.day    # 当前的天数


begin_day_of_month = date - datetime.timedelta(month_day - 1)
end_day_num = calendar.monthrange(int(date_array[0]), int(date_array[1]))[1]   # (0,30)  # (本月的第一天是星期几星期一为0,本月有多少天)
end_day_of_month = date + datetime.timedelta(end_day_num - month_day)