python获取时间

def day_get(d):
oneday = datetime.timedelta(days=1)
day = d - oneday
date_from = datetime.datetime(day.year, day.month, day.day, 0, 0, 0)
date_to = datetime.datetime(day.year, day.month, day.day, 23, 59, 59)
print([str(date_from), str(date_to)])


def week_get(d):
dayscount = datetime.timedelta(days=d.isoweekday())
dayto = d - dayscount
sixdays = datetime.timedelta(days=6)
dayfrom = dayto - sixdays
date_from = datetime.datetime(dayfrom.year, dayfrom.month, dayfrom.day, 0, 0, 0)
date_to = datetime.datetime(dayto.year, dayto.month, dayto.day, 23, 59, 59)
print([str(date_from), str(date_to)])


def month_get(d):
"""
返回上个月第一个天和最后一天的日期时间
:return
date_from: 2016-01-01 00:00:00
date_to: 2016-01-31 23:59:59
"""
dayscount = datetime.timedelta(days=d.day)
dayto = d - dayscount
date_from = datetime.datetime(dayto.year, dayto.month, 1, 0, 0, 0)
date_to = datetime.datetime(dayto.year, dayto.month, dayto.day, 23, 59, 59)
print([str(date_from), str(date_to)])
return date_from, date_to

d = datetime.datetime.now()
month_get(d)


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