python时间转换器

时间格式，处理一直是一个很繁琐的事情。特别在数据清洗过程中，不同的数据源使用不同的数据格式，处理起来相当麻烦。痛定思痛决定写一个公共的事件处理模块使用python实现，和大家分享一下。希望对大家能有所帮助。

def timeFormat(found_time):

    '''    suport unix time(10p,13p) and  utc(Accurate to seconds and milliseconds) and yyyy-mm-dd hh:mm:ss    eg:1502676456433 or 1502676456 or 2017-05-11T00:45:56Z or 2017-05-11T00:45:56.325Z or 2017-05-11 10:10:10    '''    if not found_time:        return None    found_time = str(found_time)    if(re.match("\d{10,16}",found_time)):        if(len(found_time)>=13):            found_time = float(found_time)/1000        else:            found_time = float(found_time)        ymd = time.localtime(found_time);        return time.strftime("%Y-%m-%d %H:%M:%S",ymd)    elif(re.search("\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d+[A-Z]",found_time)):        matchArr = re.findall("\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d+[A-Z]",found_time)        if(len(matchArr)>0):            found_time = matchArr[0]            utc_format = '%Y-%m-%dT%H:%M:%S.%f'+found_time[len(found_time)-1]            local_tz = pytz.timezone("Asia/Shanghai")            local_format = "%Y-%m-%d %H:%M:%S"            utc_dt = datetime.datetime.strptime(found_time,utc_format)            local_dt= utc_dt.replace(tzinfo=pytz.utc).astimezone(local_tz)            local_s = local_dt.strftime(local_format)            return local_s    elif(re.search("\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}[A-Z]",found_time)):        matchArr = re.findall("\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}[A-Z]",found_time)        if(len(matchArr)>0):            found_time = matchArr[0]            utc_format = '%Y-%m-%dT%H:%M:%S'+found_time[len(found_time)-1]            local_tz = pytz.timezone("Asia/Shanghai")            local_format = "%Y-%m-%d %H:%M:%S"            utc_dt = datetime.datetime.strptime(found_time,utc_format)            local_dt= utc_dt.replace(tzinfo=pytz.utc).astimezone(local_tz)            local_s = local_dt.strftime(local_format)            return local_s    else:        ymd=re.findall('[0-9]+', found_time)    if len(ymd)<3 or int(ymd[0])>2100 or int(ymd[0])<1800:        return None    if int(ymd[1])>12 or int(ymd[2])>31:        return None    if int(ymd[1]) not in (1,3,5,7,8,10,12) and int(ymd[2])>30:            return None    if int(ymd[1]) == 2:        if int(ymd[2])>29:            return None        if int(ymd[2])==29:            if int(ymd[0])%4!=0:                return None    if(len(ymd)>=6 and int(ymd[3])>=0 and int(ymd[3])<=24  and int(ymd[4])>=0 and int(ymd[4])<=60  and int(ymd[5])>=0 and int(ymd[5])<=60 ):        return ymd[0]+"-"+ymd[1]+"-"+ymd[2]+" "+ymd[3]+":"+ymd[4]+":"+ymd[5]    elif(len(ymd)==3):        return  ymd[0]+ '-%02d'%int(ymd[1])  +'-%02d'%int(ymd[2])    else:        return None