每 n 秒运行一次特定代码 [英] Run certain code every n seconds

问题描述

有没有办法，例如，每 n 秒打印一次 Hello World!?例如，程序会遍历我拥有的任何代码，然后一旦过了 5 秒(使用 time.sleep())，它就会执行该代码.不过，我将使用它来更新文件，而不是打印 Hello World.

Is there a way to, for example, print Hello World! every n seconds? For example, the program would go through whatever code I had, then once it had been 5 seconds (with time.sleep()) it would execute that code. I would be using this to update a file though, not print Hello World.

例如:

startrepeat("print('Hello World')", .01) # Repeats print('Hello World') ever .01 seconds

for i in range(5):
    print(i)

>> Hello World!
>> 0
>> 1
>> 2
>> Hello World!
>> 3
>> Hello World!
>> 4

推荐答案

import threading

def printit():
  threading.Timer(5.0, printit).start()
  print "Hello, World!"

printit()

# continue with the rest of your code

https://docs.python.org/3/library/threading.html#timer-objects

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