Python sleep 1 minute

Python’s time.sleep() – Pause, Stop, Wait or Sleep your Python Code

Suppose you are developing a user interface, and you support it with your code. Your user is uploading a document, and your code needs to wait for the time the file is being uploaded. Also, when you visit a complex having automated doors, you must have noticed that while you are entering the complex, the door stands still. Only when you have entered the complex, the door closes automatically. What is causing the delay in both situations?

Codes support both systems discussed above. It is the time delay function of programming languages that is causing the required time delay. We can also add time delays in our Python codes. The time module of Python allows us to establish delay commands between two statements. There are numerous ways to add a time delay and, in this article, we will discuss each method step-by-step.

Python’s time.sleep() – Pause, Stop, Wait or Sleep your Python Code

Python’s time module has a handy function called sleep() . Essentially, as the name implies, it pauses your Python program. The time.sleep() command is the equivalent to the Bash shell’s sleep command. Almost all programming languages have this feature.

The time.sleep() function

While using this function, we can specify the delay, and the compiler will execute the fixed time delay. The syntax of this function is as follows:

time.sleep() Arguments

• secs — The number of seconds the Python program should pause execution. This argument should be either an int or float .

Using Python’s time.sleep()

Here’s a quick, simple example of the syntax:

Here we have instructed the system to wait for five seconds through the first command and then wait for three hundred milliseconds, which equals 0.3 seconds. You can note here that we have written the value of the time delay inside the bracket based on the syntax.

Now let us consider another example to execute time delay.

Here we have taken a variable ‘a’ whose value we have stored as five. Now we are printing the value ‘a’ and then again printing an increased value of ‘a’. However, there is a time delay between the execution of both statements. And, we have specified that using the time.sleep() function. You must have observed that we have also imported the time module at the beginning of the code.

Now let’s see what the output is:

Here we can see that only the first command is executed. Now the output after five seconds:

Now, after a delay of five seconds, the second statement is also executed.

Advanced syntax of the sleep() function

Here’s a more advanced example. It takes user input and asks you how long you want to sleep() . It also proves how it works by printing out the timestamp before and after the time.sleep() call. Note that Python 2.x uses the raw_input() function to get user input, whereas Python 3.x uses the input() function. Now let us see the input syntax:

The code given above asks the user how long to wait. We have mentioned the command for this output in the sleeper() function. Then, the code prints the computer time at the beginning of the execution of code and after the implementation of code. This way, we get to see the actual functioning of the delay function. Now let’s see the output:

The system asks for our input, i.e., how long we want the system to wait. Let’s enter 5 seconds and observe the final output.

We can see that the starting computer time(“Before”) and ending computer time(“After”) have a time difference of five seconds.

The Accuracy of time.sleep()

The time.sleep() function uses the underlying operating system’s sleep() function. Ultimately there are limitations of this function. For example, on a standard Windows installation, the smallest interval you may delay is 10 — 13 milliseconds. The Linux kernels tend to have a higher tick rate, where the intervals are generally closer to 1 millisecond. Note that in Linux, you can install the RT_PREEMPT patch set, which allows you to have a semi-realtime kernel. Using a real-time kernel will further increase the accuracy of the time.sleep() function. However, unless you want to sleep for a brief period, you can generally ignore this information.

Using Decorators To Add time.sleep() Command

Decorators are used for creating simple syntax for calling higher-order functions. When can we use decorators? Suppose we have to test a function again, or the user has to download a file again, or you have to check the status of an interface after a specific time interval. You require a time delay between the first attempt and the second attempt. Thus, you can use decorators in cases where you need to check repeatedly and require a time delay.

Let’s consider an example using decorators. In this program, we will calculate the amount of time taken for the execution of the function.

Here time_calc() is the decorator function extending and containing the other functions, thus providing a simple syntax. Let’s see what we get as the output.

Using Threads To Add time.sleep() Command

Multiple-threading in Python is equivalent to running several programs simultaneously. When multi-threading is combined with the time module, we can solve complex problems quickly. Multi-threading functions are available from the threading module.

Let’s print the alphabet song using multi-threading and time delay.

Here one thread is being used to print the individual alphabets. There is a time delay of 0.5 seconds as well. When you run the program, you will see that each line of the alphabet song is printed after a delay of 0.5 seconds. Let’s see what the output is:

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Python time sleep()

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Hello everyone, hope you are learning python well. In this tutorial we will learn about python time sleep() method. Python sleep function belongs to the python time module that is already discussed earlier

Python time sleep

Python time sleep function is used to add delay in the execution of a program. We can use python sleep function to halt the execution of the program for given time in seconds. Notice that python time sleep function actually stops the execution of current thread only, not the whole program.

Python time sleep() function syntax

Python sleep() is a method of python time module. So, first we have to import the time module then we can use this method. Way of using python sleep() function is: Here the argument of the sleep() method t is in seconds. That means, when the statement time.sleep(t) is executed then the next line of code will be executed after t seconds. See the following example:

# importing time module import time print("Before the sleep statement") time.sleep(5) print("After the sleep statement") 

If you run the above code then you will see that the second print executes after 5 seconds. So you can make delay in your code as necessary. The argument can be in floating value also to have more precise delay. For example you want to make delay for 100 milliseconds which is 0.1 seconds, as following:

import time time.sleep(0.100) 

Python sleep example

import time startTime = time.time() for i in range(0,5): print(i) # making delay for 1 second time.sleep(1) endTime = time.time() elapsedTime = endTime - startTime print("Elapsed Time = %s" % elapsedTime) 

0 1 2 3 4 Elapsed Time = 5.059988975524902 

Elapsed time is greater than 5 because each time in the for loop, execution is halted for 1 second. The extra time is because of the execution time of the program, operating system thread scheduling etc.

Different delay time of python sleep()

import time for i in [ .5, .1, 1, 2]: print("Waiting for %s" % i , end='') print(" seconds") time.sleep(i) 

Waiting for 0.5 seconds Waiting for 0.1 seconds Waiting for 1 seconds Waiting for 2 seconds 

Dramatic printing using sleep()

# importing time module import time message = "Hi. I am trying to create suspense" for i in message: # printing each character of the message print(i) time.sleep(0.3) 

If you run the above code then, you will see that after printing every character of the message it’s taking some time, which seems like dramatic.

Python thread sleep

Python time sleep() function is very important method for multithreading. Below is a simple example showing that the python time sleep function halts the execution of current thread only in multithreaded programming.

import time from threading import Thread class Worker(Thread): def run(self): for x in range(0, 11): print(x) time.sleep(1) class Waiter(Thread): def run(self): for x in range(100, 103): print(x) time.sleep(5) print("Staring Worker Thread") Worker().start() print("Starting Waiter Thread") Waiter().start() print("Done") 

Below image shows the output produced by above python thread sleep example. From the output it’s very clear that only the threads are being stopped from execution and not the whole program by python time sleep function. That’s all about python time sleep function or python sleep function. Reference: StackOverFlow Post, API Doc

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Использование функции sleep() в Python

Функция sleep() используется для задержки определённых процессов на указанное время (в секундах). В этой статье мы рассмотрим несколько примеров, которые позволят вам получше познакомиться с методом sleep() в Python.

Синтаксис

Во-первых, чтобы запустить код, нам нужно добавить модуль time . Функция sleep() входит в этот модуль и принимает только один параметр – время в секундах, на которое остановится наша программа.

Простой пример функции sleep()

Чтобы понять смысл функции sleep() , разберём простой пример. Три строки выводятся в определённый промежуток времени – задержку обеспечивает sleep . Сперва выводится первая строка, затем идёт функция sleep() , которая задерживает вывод на 2 секунды. Точно так же для следующего print мы используем sleep на 5 секунд. Код выглядит следующим образом:

import time print('Hello world') time.sleep(2) print('sleep python function') time.sleep(5) print('sleep function is working') # Вывод Hello world sleep python function sleep function is working Process finished with exit code 0

В тексте этого не видно, но после запуска кода строки выводятся через указанные интервалы времени.

Функции sleep() и time()

Рассмотрим пример использования sleep() для создания промежутка времени. Мы используем функцию time() , чтобы узнать текущее время, и localtime() , чтобы получить текущие дату и время в конкретной местности. Кроме того, есть функция strftime() («string from time»), которая возвращает время в виде строки в указанном формате.

import time current = time.localtime(time.time()) print(time.strftime('Start time is: %H:%M:%S', current)) print('2 seconds wait') time.sleep(2) current = time.localtime(time.time()) print(time.strftime('Ending time is: %H:%M:%S', current)) # Вывод Start time is: 14:54:35 2 seconds wait Ending time is: 14:54:37 Process finished with exit code 0

В результате интервал между двумя моментами времени составил две секунды.

Цифровые часы с помощью sleep() и timestamp()

В этом скрипте мы создадим 7 временных отметок и добавим задержку на 2 секунды между каждыми двумя отметками. Первый шаг такой же, как прежде.

От предыдущего этот пример отличается тем, что мы создали временные отметки несколько раз с помощью цикла for . Цикл отработает 7 итераций. Опять же, мы использовали strftime() , чтобы получить время в виде строки, а sleep() — чтобы обеспечить задержку в 2 секунды между каждыми двумя отметками.

import time for i in range(7): currenttime = time.localtime() timestamp = time.strftime('%H:%M:%S', currenttime) time.sleep(2) print(timestamp) # Вывод 15:00:32 15:00:34 15:00:36 15:00:38 15:00:40 15:00:42 15:00:44 Process finished with exit code 0

Мы получили 7 временных отметок через каждые 2 секунды.

Использование sleep() со строкой

Применить функцию sleep() со строкой вам может понадобиться, если захотите вывести каждый символ строки с определённой задержкой. Реализовать это очень просто. Рассмотрим эту задачу в коде ниже.

В качестве строки возьмём слово. Переберем это слово в цикле for , а на каждой итерации поставим задержку в 4 секунды.

import time string = 'Pythonist' for i in string: print(i) time.sleep(2) # Вывод P y t h o n i s t Process finished with exit code 0

Заключение

В этой статье мы рассмотрели применение функции sleep() в различных ситуациях. Она помогает при решении различных задач, связанных со временем. Теперь вы можете добавлять задержки в свою программу, например, чтобы предотвратить неправильное использование системных ресурсов.

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