Python time sleep() function suspends execution for the given number of seconds.
Syntax of time sleep()
Syntax : sleep(sec)
Parameters :
- sec : Number of seconds for which the code is required to be stopped.
Returns : VOID.
Sometimes, there is a need to halt the flow of the program so that several other executions can take place or simply due to the utility required. sleep() can come in handy in such a situation which provides an accurate and flexible way to halt the flow of code for any period of time. This function discusses the insight of this function.
Example 1: Creating a Time Delay in seconds
The start time and end time will be printed with 6 seconds delay.
Python3
import time# printing the start timeprint("The time of code execution begin is : ", time.ctime())# using sleep() to hault the code executiontime.sleep(6)# printing the end timeprint("The time of code execution end is : ", time.ctime()) |
Output:
The time of code execution begin is : Mon Apr 9 20:57:10 2018 The time of code execution end is : Mon Apr 9 20:57:16 2018
Example 2: Creating a Time Delay in minutes
The list will be displayed after the delay of 3 minutes
Python3
import time# creating and Initializing a listLanguages = ['Java', 'C++', 'Python', 'Javascript', 'C#', 'C', 'Kotlin']# creating a time delay of 3 minutestime.sleep(3 * 60)print(Languages) |
Output:
After the delay of 3 minutes, the list will be displayed as:
['Java', 'C++', 'Python', 'Javascript', 'C#', 'C', 'Kotlin']
Application of time.sleep()
There are many applications that sleep() is used for. Be its execution of the background thread which is repeated at regular intervals, this can be implemented with the help of sleep(). Another popular application is using sleep() to print the words letter by letter for a good user interface. The latter is represented in the code below.
Example 1: Creating Time Delay in the Python loop
Python3
import time# initializing stringstrn = "Lazyroar"# printing neveropen after delay# of each characterfor i in range(0, len(strn)): print(strn[i], end="") time.sleep(2) |
Output:
GeeksForGeeks
Note: Visible effect of sleep() can be seen in the local editor.
Example 2: Creating Time Delay in Python List
Python3
# importing time packageimport time# creating a time delay of 5 secondstime.sleep(5)# creating and Initializing a listmyList = ['Jai', 'Shree', 'RAM', 5, 'August', 2020]# the list will be displayed after the# delay of 5 secondsprint(myList) |
Output:
After the delay of 5 seconds, we will get the output as:
['Jai', 'Shree', 'RAM', 5, 'August', 2020]
Example 3: Creating Time Delay in Python Tuple
Python3
# importing time packageimport time# creating a time delay of 4 secondstime.sleep(4)# creating and Initializing a tuplemytuple = ('Anil Kumbl', 'Sachin Tendulkar', 'Sunil Gavaskar', 'Rahul Dravid', 'Mahendra Singh Dhoni', 'Dennis Lillee', 'Muttiah Muralitharan', 'Shane Warne')# the tuple will be displayed after the delay of 4 secondsprint(mytuple) |
Output:
After the delay of 4 seconds, we will get the output as:
('Anil Kumbl', 'Sachin Tendulkar', 'Sunil Gavaskar', 'Rahul Dravid',
'Mahendra Singh Dhoni', 'Dennis Lillee', 'Muttiah Muralitharan', 'Shane Warne')
Example 4: Time Delay in a List Comprehension
Python3
# importing time packageimport time# creating and Initializing a listcricketers = ['Anil Kumble', 'Sachin Tendulkar', 'Sunil Gavaskar', 'Rahul Dravid', 'Mahendra Singh Dhoni', 'Dennis Lillee', 'Muttiah Muralitharan', 'Shane Warne']# time delay of 7 seconds is created# after every 7 seconds item of list gets displayedcricketers = [(time.sleep(7), print(cric)) for cric in cricketers] |
Output:
After every 7 seconds, the items on the list will be displayed as:
Anil Kumble Sachin Tendulkar Sunil Gavaskar Rahul Dravid Mahendra Singh Dhoni Dennis Lillee Muttiah Muralitharan Shane Warne
Example 5: Creating Multiple Time Delays
Python3
# importing time packageimport time# creating and Initializing a listLanguages = ['Java', 'C++', 'Python', 'Javascript', 'C#', 'C', 'Kotlin']# creating a time delay of 5 secondstime.sleep(5)# the list will be displayed after the delay of 5 secondsprint(Languages)for lan in Languages: # creating a time delay of 13 seconds time.sleep(13) # After every 13 seconds an item of list will be displayed print(lan) |
Output:
After the delay of 5 seconds, the list will be displayed as:
['Java', 'C++', 'Python', 'Javascript', 'C#', 'C', 'Kotlin']
Then after every 13 seconds, the items on the list will be displayed as:
Java C++ Python Javascript C# C Kotlin
