时间戳，日期，string互转

import time
import datetime
import operator
def makeStamp(y,m,d,format='%Y-%m-%d'):
    """make timestamp from date """
    date_tuple=str(datetime.date(y, m, d))
    print(date_tuple)
    stamp=time.mktime(time.strptime(date_tuple,format))
    return stamp

def get_date(stamp,format="%Y:%m:%d") ->str:
    """get string date by  timestamp """
    return time.strftime(format,time.localtime(stamp))

def gen_stamp(y,m,d):
    """:return stamp: 1567267200.0 """
    date=datetime.date(y,m,d)
    stamp_date=time.mktime(date.timetuple())
    print(stamp_date)
    return  stamp_date

def str_to_date(date_str)->datetime:
    """return date:2019-01-30,input format:%Y-%m-%d or %Y/%m/%d,but need replace"""
    dates=datetime.datetime.strptime(date_str, '%Y-%m-%d').date()
    # print(dates.timetuple())
    return dates

def genstamp_toy(date_str)->float:
    """ input format :2019-01-03"""
    tp=str_to_date(date_str).timetuple()
    return  time.mktime(tp)

def cmp_le(a,b) ->bool:
   c,d=genstamp_toy(a),genstamp_toy(b)
   return True if operator.le(c,d) else False

def cmp_ge(a,b) ->bool:
    c, d = genstamp_toy(a), genstamp_toy(b)
    return True if operator.ge(c, d) else False

def ot():
    y=2019
    m=9
    d=9
    dtime = datetime.date(y,m,d)
    un_time = time.mktime(dtime.timetuple())
    # 将unix时间戳转换为“当前时间”格式
    times = time.strftime("%Y/%m/%d", time.localtime(un_time))
    #times = datetime.datetime.fromtimestamp(un_time)
    print(times,type(times))