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How to make a Python program wait?

Last Updated : 17 Apr, 2025

The goal is to make a Python program pause or wait for a specified amount of time during its execution. For example, you might want to print a message, but only after a 3-second delay. This delay could be useful in scenarios where you need to allow time for other processes or events to occur before continuing with the program. Let’s explore different methods to achieve this efficiently.

Using time.sleep()

time.sleep() is used to pause the entire program for a given number of seconds. During this time, the program does nothing and waits, blocking all other operations. It’s a simple and blocking delay.

Python

import time print("Wait for 3 seconds...") time.sleep(3) print("Done waiting!")

Output

Output

Using time.sleep()

Explanation: This code pauses the program for 3 seconds. During this time, the program does nothing and waits. After 3 seconds, it continues and prints “Done waiting!”. It’s a blocking delay, meaning no other tasks can run during this time.

Using asyncio.run()

This method is used in asynchronous programming. asyncio.sleep() pauses only the current async task without blocking the rest of the program, allowing other tasks to run simultaneously. It’s a non-blocking delay.

Python

import asyncio print("Wait for 3 seconds...") asyncio.run(asyncio.sleep(3)) print("Done waiting!")

Output

Output

Using asyncio.run()

Explanation: asyncio.run() function runs the asynchronous task and once 3 seconds have passed, it continues to the next line and prints “Done waiting!”.

Using threading.Event().wait()

This method pauses only the thread that calls it, without affecting other threads. It’s useful when working with multiple threads and you want to delay or synchronize one of them without blocking everything.

Python

import threading print("Wait for 3 seconds...") threading.Event().wait(3) print("Done waiting!")

Output

Output

Using threading.Event().wait()

Explanation: This code pauses the current thread for 3 seconds. Other threads can continue running during this time. After the delay, it prints “Done waiting!”. This is a thread-specific blocking delay.

Using sched.scheduler().enter()

This schedules a function to be executed after a delay. It doesn’t pause the program but registers a task to run later, allowing the rest of the code to continue running in the meantime.

Python

import time import sched  s = sched.scheduler(time.time, time.sleep)  print("Scheduling task...") s.enter(3, 1, lambda: print("Executed after 3 seconds!")) s.run()

Output

Output

Using sched.scheduler().enter()

Explanation: sched.scheduler(time.time, time.sleep) creates a scheduler using the current time and time.sleep for managing delays. s.enter(3, 1, lambda: print(“Executed after 3 seconds!”)) schedules a task to run after 3 seconds with priority 1. Finally, s.run() starts the scheduler and executes the task after the delay.

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