from threading import *
import time
def function1():
while True:
print("function1()")
time.sleep(5)
def function2():
while True:
print("function2()")
time.sleep(5)
f1 = Timer(4.0, function1)
f2 = Timer(3.0, function2)
f1.start()
f2.start()
'''
run:
function2()
function1()
function2()
function1()
function2()
function1()
function2()
function1()
...
'''