What Is Sleeping Time in Python?
Have you ever been forced to delay the execution of a Python programme? You typically wish your code to run as rapidly as possible. There are, however, instances when it serves your best interests to put your program to sleep for a while.
For instance, to mimic a pause in our programme, we may use Python's sleep() method. We may need to wait while data uploads or downloads; the graphic loads or is shown to the screen. We may need to take a break even amid requests to a web API or database operations. Each of these situations and many more can benefit from inserting Python sleep() methods into our code.
The Python time sleep method is applied to pause a program's execution. We can employ the sleep method of the time module in our Python programs to stop the execution of the programme for a certain amount of time in seconds. Remember that the Python time sleep method halts the current thread's execution, not the entire programme.
Python time.sleep() Function Syntax
The sleep() function is a method of the time module. Therefore, before using this function, we must first import the time module into our program. Following is the syntax of using the sleep function.
The sleep() method's input, t, is the time the programme is to be delayed which is given in seconds. That indicates that the subsequent code line would run after the expression time.sleep(t) has been executed after t seconds of execution of the previous code line. See the example below:
Sun Aug 28 17:07:33 2022 Before delay of the program After delay of the program Sun Aug 28 17:08:23 2022
The second print statement is executed after 50 seconds when the mentioned code is invoked. Consequently, we can add delays as needed to our code. To have a more precise delay in execution, we can also give the parameter t in a floating point number. For instance, if we wish to add a delay of 10 milliseconds (or 0.01 seconds), do as follows:
1661706874.95425 Before delay of the program After delay of the program 1661706875.0580375
Python time.sleep Example
Let's look at the next Python time.sleep() function example.
Sun Aug 28 17:19:50 2022 0 1 2 3 4 5 6 7 8 9 Sun Aug 28 17:20:40 2022
Due to the for loop's 5-second timeouts, the total time spent is greater than 5. The additional time is a result of the program's processing time, operating system thread sequencing, etc.
Creating a Delay in Time in a Python List
Thu Sep 1 12:28:05 2022 ['Time', 'Sleep', 'Python'] Thu Sep 1 12:28:15 2022
Creating a Delay in Time in a Python Tuple
Thu Sep 1 12:32:31 2022 ('Time', 'Sleep', 'Python') Thu Sep 1 12:32:46 2022
Creating a Delay in Time Delay in List Comprehension
Thu Sep 1 12:38:03 2022 Delay Time Sleep Python Time Module Thu Sep 1 12:39:03 2022
Creating Many Time Delays in a Program
Python Thread Sleep
The sleep() method in Python is a crucial multithreading technique. The straightforward example demonstrates how the Python time sleep method merely halts the operation of the currently running thread in multithreaded coding.
Including a Python time.sleep() Request With Decorators
We are occasionally required to try a failed operation again. This is a frequent use scenario when we have to repeat a file downloading since the server was overloaded. Including a Python sleep() function between every request is preferable because we usually won't like to send requests to the server frequently.
I've also had to monitor the status of a UI while running an automated test, yet another scenario. The user interface may load quicker or slower than expected based on the machine we are using to test, which could alter the information displayed on the screen when my software is checking anything.
In this situation, we can instruct the application to take a little break and verify everything again a moment or two later. This may determine whether a test is passed or failed.
In either of these scenarios, we may add a Python sleep() method using a decorator. Let's examine an illustration:
This is the decorator in the above code: sleep(). It receives a time window and a retry count, with a default setting of three. The real decorator(), a function that takes the decorated method, is contained within the sleep() method.
Last but not least, the inner method wrapper() takes both keyword arguments and parameters passed to the decorated method. The magic happens right here! We try invoking the procedure once more by using a while loop. If there is an exception raised, we should declare it over. Try executing the function once more after using sleep() and increasing the number of retries.