Convert timestamp to year-month-day format

#Processing time format 
def deal_date(DepartDate): 
    time01 = DepartDate.split('+')[0].split('(')[1] 
    time02 = time01[0:10] 
    time02 = int(time02) 
    # print( time02) 
    timeArray = time.localtime(time02) 
    formatTime = time.strftime("%Y-%m-%d", timeArray) 
    return formatTime