from time import time, sleep

from random import randint

def fix_time(): # return base_t, fix_t

this_t = time()

if 0 <= this_t % T <= T - 1: # make fix_t 1~61

base_t = this_t - this_t % T # bast_t % T == 0

fix_t = T - this_t % T

else:

base_t = int(this_t)

# base_t = this_t - this_t % T # bast_t % T == 0

fix_t = 1 + this_t % T

return base_t, fix_t

def delay(): # make 0~1000 ms delay

d = randint(0,1000)/1000

# print("delay %.3f s" % d)

return sleep(d)

T = 5 # 60, 30, 20, 15, 12, 10, 6, 5, 4, 3, 2, 1

print("fetch service start")

this_t = time()

base_t, fix_t = fix_time()

base_t = base_t - base_t%T

print("t=%.3f (%.3f), base=%.3f, fix=%.3f #init" % (this_t, this_t%T, base_t, fix_t))

cout = 0

while True:

last_t = time()

print("t=%.3f (%.3f), base=%.3f, d=%.3f #exec" % (last_t, last_t%T, base_t, last_t-base_t))

delay()

cout = cout + 1

if cout == 6: # fix_time counter

cout = 0

base_t, fix_t = fix_time()

print("t=%.3f (%.3f), base=%.3f, fix=%.3f" % (last_t, last_t%T, base_t, fix_t))

sleep(fix_t)

else:

base_t = int(last_t) # set next_base

# print("t=%.3f (%.3f), base=%.3f #sleep" % (last_t, last_t%T, base_t))

sleep(5)