def convert_time(t):
        s, ns = divmod(t, 1000000000)
        m, s = divmod(s, 60)
        end_res = ['00:', '00:', '00:', '00']
        res = ''
        if m < 60:
            if len(str(m)) < 2:
                end_res[1] = '0'+str(m)+':'
            else:
                end_res[1] = str(m)+':'
            if len(str(s)) < 2:
                end_res[2] = '0'+str(s)+':'
            else:
                end_res[2] = str(s)+':'
            try:
                end_res[3] = str(round(ns/1000000000))
            except IndexError:
                end_res[3] = '00'
        else:
            h, m = divmod(m, 60)
            if len(str(h)) < 2:
                end_res[0] = '0'+str(h)+':'
            else:
                end_res[0] = str(h)+':'
            if len(str(m)) < 2:
                end_res[1] = '0'+str(m)+':'
            else:
                end_res[1] = str(m)+':'
            if len(str(s)) < 2:
                end_res[2] = '0'+str(s)+':'
            else:
                end_res[2] = str(s)+':'
            end_res[3] = str(round(ns/1000000000))
        for x in range(0, 4):
            res += end_res[x]
        print(res)

list ['00:','00:','00:','00:']

import datetime
def convert_time(t):
    dt = datetime.datetime.fromtimestamp(t/1e9)
    mytime = dt.strftime('%H:%M:%S:%f')[:-4].split(':')
    return map(lambda x: '%s:' % x, mytime)

import datetime
def convert_time(t):
    dt = datetime.datetime.fromtimestamp(t/1e9)
    mytime = dt.strftime('%H:%M:%S:%f')[:-4].split(':')
    return map(lambda x: '%s:' % x, mytime)
a = convert_time(2497123419)
for x in a:
    print(x)

dt = datetime.datetime.utcfromtimestamp(t/1e9)