Pausing program execution in Python
This tutorial will demonstrate various ways to pause a program in Python.
Pausing the execution of a program or application is used in different scenarios, such as when a program requires user input. We may also need to pause the program for a few seconds to let the user read some important information or instructions before continuing with the program. Pausing the program is also useful when we need to make sure that the user reads the instructions before selecting the action he/she wants the program to take.
We can pause the program for some specific length of time or for some input using different methods, which are explained below.
time.sleep()Pause the program
using the method in Python
time.sleep(secs)Method secssuspends execution of the given thread for the provided number of seconds.
Therefore, if we need to pause the execution of the program, we can time.sleep()do so by providing the duration in seconds to the method. The following sample code demonstrates how to use time.sleep()the method to pause a Python program.
import time
time_duration = 3.5
time.sleep(time_duration)
input()Using functions to pause a program
in Python
The function in Python 3 and the function input()in older versions takes input as lines from and returns the input with appended.raw_input()sys.stdin\n
If we want to pause a program to get some input from the user, we can do so using the input()or raw_input()function, depending on the version of Python.
Example code (Python 3):
name = input("Please enter your name: ")
print("Name:", name)
Example code (Python 2):
name = raw_input("Please enter your name: ")
print("Name:", name)
We can also use this method to pause the program until Entera key is pressed. The following sample code demonstrates how to use the raw_input()and input()functions to achieve this purpose.
Example code (Python 3):
input("Please press the Enter key to proceed")
Sample code (old version):
raw_input("Please press the Enter key to proceed")
os.system("pause")Pause the program
using the method in Python
os.system("pause")The method pauses the execution of the program until the user does not press any keys. The following sample code demonstrates how to use os.system("pause")the method to pause a Python program.
import os
os.system("pause")
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