import time, datetime
k = 1
my_time_client = '06:14'
def my_time():
	
	now_time = datetime.datetime.now()
	my_hour = str(now_time.hour)
	my_minute = str(now_time.minute)
	
	if len (my_hour) == 1 : my_hour = '0' + my_hour
	if len (my_minute) == 1 : my_minute = '0' + my_minute
	
	my_time = my_hour + ":"+ my_minute
	return my_time
def func1():
    print 'func1'
def func2():
    print 'func2'
		
while True:
    start = time.time()
    func1()
    if my_time() == my_time_client:
        func2()
    finish = time.time()
    print (k*60-(finish-start))
    time.sleep (k*60-(finish-start))

datetime.datetime.now().strftime('%H:%M')

# python2.7
import sys
import time
import random
def func1(max_work_time=30*60):
    # симуляция работы
    stop_time = time.time() + random.randint(5, max(5, max_work_time))
    while time.time() < stop_time:
        sys.stdout.write('.')
        sys.stdout.flush()
        time.sleep(1)
    print
def func2():
    func1(60)
next_launch_time = None
def shedule_next_launch_time():
    global next_launch_time
    next_launch_time = time.time() + 15*60
while True:
    func1()
    if next_launch_time is None or next_launch_time <= time.time():
        shedule_next_launch_time()
        func2()
    # ...

from time import sleep
from datetime import datetime
time_start1 = ('19:54','06:00','20:30','12:45')
time_start2 = ('13:44','03:00','23:30','10:45')
while True:
    d = datetime.today()
    #print d.strftime('%H:%M')
    time_x = d.strftime('%H:%M')
    if time_x in time_start1:
        print "start func_1"
        sleep(59)
    if time_x in time_start2:
        print "start func_2"