setTimeout

https://docs.python.org/3.6/library/sched.html

The sched module defines a class which implements a general purpose event scheduler:

class sched.scheduler(timefunc=time.monotonic, delayfunc=time.sleep)

The scheduler class defines a generic interface to scheduling events. It needs two functions to actually deal with the “outside world” — timefunc

should be callable without arguments, and return a number (the “time”, in any units whatsoever). If time.monotonic is not available, the timefunc default is time.time instead. The delayfunc function should be callable with one argument, compatible with the output of timefunc, and should delay that many time units. delayfunc

will also be called with the argument 0 after each event is run to allow other threads an opportunity to run in multi-threaded applications.

>>> import sched, time
>>> s = sched.scheduler(time.time, time.sleep)
>>> def print_time(a='default'):
...     print("From print_time
 
", time.time(), a)
...
>>> def print_some_times():
...     print(time.time())
...     s.enter(10, 1, print_time)
...     s.enter(5, 2, print_time, argument=('positional',))
...     s.enter(5, 1, print_time, kwargs={'a': 'keyword'})
...     s.run()
...     print(time.time())
...
>>> print_some_times()
930343690.257
From print_time 930343695.274 positional
From print_time 930343695.275 keyword
From print_time 930343700.273 default
930343700.276

setInterval

https://github.com/Hzzkygcs/setInterval-python

Sometimes, when you're writing code in python, you have to make a function that needs to be executed every certain amount of time. This class will help you do that easily and dynamically on python. Open all of the flexibility to maintain the interval.

To declare an interval function, you just need to call the setInterval class. The parameter is as follows: setInterval(Function, Interval, Arguments=[]) The Interval is in second, by using number data type. The Arguments is the arguments you need to pass to the function in an array.

Here's a simple example:

def interval(name="world"):
  print(f"Hello {name}!")

# function named interval will be called every two seconds
# output: "Hello world!"
interval1 = setInterval(interval, 2) 

# function named interval will be called every 1.5 seconds
# output: "Hello Jane!"
interval2 = setInterval(interval, 1.5, ["Jane"]) 

實現程式碼：

https://github.com/Hzzkygcs/setInterval-python/blob/master/set_interval.py

從中可以看出其使用原生API threading.Timer 實現。原型如：

https://stackoverflow.com/questions/33473899/how-set-a-loop-that-repeats-at-a-certain-interval-in-python

from threading import Timer, Thread

def call_at_interval(time, callback, args):
    while True:
        timer = Timer(time, callback, args=args)
        timer.start()
        timer.join()

def setInterval(time, callback, *args):
    Thread(target=call_at_interval, args=(time, callback, args)).start()