Sleeping for a number of milliseconds in Python
In this tutorial, we will look at various ways to pause or suspend the execution of a program in Python for a given amount of time. Let's say we want to pause the execution of a program for a few seconds to let the user read instructions about the next step of the program. We need some way to tell the program to go in for a specific number of seconds or milliseconds. We will also discuss a way to make the program call a provided function after a specific time interval without pausing or suspending the program execution.
In Python, we can use the following methods to pause or suspend the execution of a program for a given amount of time.
time.sleep()Using the sleep method
in Python
time.sleep(secs)The method pauses or suspends the execution of the calling thread for secsthe number of seconds provided by the parameter. Therefore, we need to call time.sleep()the method to put the program into sleep state for a specific time.
The following sample code demonstrates how to use time.sleep()the method to make the program sleep for a specified number of seconds.
import time
time.sleep(1.5)
print("1.5 seconds have passed")
To pause the program for a few milliseconds, we need to divide the input 1000, as shown in the following example code:
import time
time.sleep(400 / 1000)
print("400 milliseconds have passed")
threading.Timer()Using the sleep method
in Python
threading.Timer(interval, function, args, kwargs)The method waits for intervaltime equal to seconds and then calls the function with arguments argsand keyword arguments .kwargs
The method is useful if we want the program to wait for a specific amount of time and then call the function threading.Timer(). The following sample code demonstrates how to use threading.Timer()the method to make the program wait for intervalseconds before performing some task.
from threading import Timer
def nextfunction():
print("Next function is called!")
t = Timer(0.5, nextfunction)
t.start()
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